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Challengers of the Unknown #21
	DC Comics, 8-9/61

France Herron story		2nd appearance of Cosmo.
Bob Brown cover and art

Books	CGC Label	CGC Total	Avg. Grade	Census Date	10	9.9	9.8	9.6	9.4	9.2	9.0	8.5	8.0	7.5	7.0	6.5	6.0	5.5	5.0	4.5	4.0	3.5	3.0	2.5	2.0	1.8	1.5	1.0	0.5
1. Challengers of the Unknown 21 (8-9/61, DC Comics)	Universal	2	6.75	July 01, 2001											1	1
2. Challengers of the Unknown 21 (8-9/61, DC Comics)	Universal	2	6.75	January 27, 2002											1	1
3. Challengers of the Unknown 21 (8-9/61, DC Comics)	Universal	4	7.13	July 17, 2003										2	1	1
4. Challengers of the Unknown 21 (8-9/61, DC Comics)	Universal	4	7.13	January 08, 2004										2	1	1
5. Challengers of the Unknown 21 (8-9/61, DC Comics)	Universal	4	7.13	July 12, 2004										2	1	1
6. Challengers of the Unknown 21 (8-9/61, DC Comics)	Universal	4	7.13	December 16, 2004										2	1	1
7. Challengers of the Unknown 21 (8-9/61, DC Comics)	Universal	4	7.13	July 07, 2005										2	1	1
8. Challengers of the Unknown 21 (8-9/61, DC Comics)	Universal	5	7.20	January 27, 2006										3	1	1
9. Challengers of the Unknown 21 (8-9/61, DC Comics)	Universal	6	7.25	June 20, 2006										4	1	1
10. Challengers of the Unknown 21 (8-9/61, DC Comics)	Universal	8	6.81	January 10, 2007										4	1	1	1		1
11. Challengers of the Unknown 21 (8-9/61, DC Comics)	Universal	8	6.81	July 05, 2007										4	1	1	1		1
12. Challengers of the Unknown 21 (8-9/61, DC Comics)	Universal	9	6.83	January 09, 2008										4	2	1	1		1
13. Challengers of the Unknown 21 (8-9/61, DC Comics)	Universal	9	6.89	July 01, 2008										5	1	1	1		1
14. Challengers of the Unknown 21 (8-9/61, DC Comics)	Universal	9	6.89	January 13, 2009										5	1	1	1		1
15. Challengers of the Unknown 21 (8-9/61, DC Comics)	Universal	9	6.89	June 24, 2009										5	1	1	1		1
16. Challengers of the Unknown 21 (8-9/61, DC Comics)	Universal	9	6.89	December 15, 2009										5	1	1	1		1
17. Challengers of the Unknown 21 (8-9/61, DC Comics)	Universal	9	6.89	June 14, 2010										5	1	1	1		1
18. Challengers of the Unknown 21 (8-9/61, DC Comics)	Universal	10	6.90	December 27, 2010										5	2	1	1		1
19. Challengers of the Unknown 21 (8-9/61, DC Comics)	Universal	12	6.98	June 27, 2011						1				5	2	1	1	1	1
Books	CGC Label	CGC Total	Avg. Grade	Census Date	10	9.9	9.8	9.6	9.4	9.2	9.0	8.5	8.0	7.5	7.0	6.5	6.0	5.5	5.0	4.5	4.0	3.5	3.0	2.5	2.0	1.8	1.5	1.0	0.5
20. Challengers of the Unknown 21 (8-9/61, DC Comics)	Universal	12	6.98	January 02, 2012						1				5	2	1	1	1	1
21. Challengers of the Unknown 21 (8-9/61, DC Comics)	Universal	13	7.15	July 02, 2012						2				5	2	1	1	1	1
22. Challengers of the Unknown 21 (8-9/61, DC Comics)	Universal	13	7.15	December 31, 2012						2				5	2	1	1	1	1
23. Challengers of the Unknown 21 (8-9/61, DC Comics)	Universal	13	7.15	June 22, 2013						2				5	2	1	1	1	1
24. Challengers of the Unknown 21 (8-9/61, DC Comics)	Universal	13	7.15	December 31, 2013						2				5	2	1	1	1	1
25. Challengers of the Unknown 21 (8-9/61, DC Comics)	Universal	13	7.15	July 01, 2014						2				5	2	1	1	1	1
26. Challengers of the Unknown 21 (8-9/61, DC Comics)	Universal	15	6.99	December 30, 2014						2				5	3	1	1	1	2
27. Challengers of the Unknown 21 (8-9/61, DC Comics)	Universal	15	6.99	June 30, 2015						2				5	3	1	1	1	2
28. Challengers of the Unknown 21 (8-9/61, DC Comics)	Universal	15	6.99	December 29, 2015						2				5	3	1	1	1	2
29. Challengers of the Unknown 21 (8-9/61, DC Comics)	Universal	16	7.13	June 28, 2016						3				5	3	1	1	1	2
30. Challengers of the Unknown 21 (8-9/61, DC Comics)	Universal	16	7.13	December 27, 2016						3				5	3	1	1	1	2
31. Challengers of the Unknown 21 (8-9/61, DC Comics)	Universal	16	7.13	June 27, 2017						3				5	3	1	1	1	2
32. Challengers of the Unknown 21 (8-9/61, DC Comics)	Universal	17	7.12	January 02, 2018						3				5	4	1	1	1	2
33. Challengers of the Unknown 21 (8-9/61, DC Comics)	Universal	17	7.12	July 03, 2018						3				5	4	1	1	1	2
34. Challengers of the Unknown 21 (8-9/61, DC Comics)	Universal	17	7.12	January 01, 2019						3				5	4	1	1	1	2
35. Challengers of the Unknown 21 (8-9/61, DC Comics)	Universal	17	7.12	July 02, 2019						3				5	4	1	1	1	2
36. Challengers of the Unknown 21 (8-9/61, DC Comics)	Universal	18	6.84	December 31, 2019						3				5	4	1	1	1	2						1
37. Challengers of the Unknown 21 (8-9/61, DC Comics)	Universal	18	6.84	June 30, 2020						3				5	4	1	1	1	2						1
38. Challengers of the Unknown 21 (8-9/61, DC Comics)	Universal	19	6.90	December 29, 2020						3			1	5	4	1	1	1	2						1
39. Challengers of the Unknown 21 (8-9/61, DC Comics)	Universal	21	6.65	June 29, 2021						3			1	5	4	1	1	2	2				1		1
Books	CGC Label	CGC Total	Avg. Grade	Census Date	10	9.9	9.8	9.6	9.4	9.2	9.0	8.5	8.0	7.5	7.0	6.5	6.0	5.5	5.0	4.5	4.0	3.5	3.0	2.5	2.0	1.8	1.5	1.0	0.5
40. Challengers of the Unknown 21 (8-9/61, DC Comics)	Universal	21	6.65	December 28, 2021						3			1	5	4	1	1	2	2				1		1
41. Challengers of the Unknown 21 (8-9/61, DC Comics)	Universal	21	6.65	June 28, 2022						3			1	5	4	1	1	2	2				1		1
42. Challengers of the Unknown 21 (8-9/61, DC Comics)	Universal	23	6.83	December 27, 2022						3	1	1	1	5	4	1	1	2	2				1		1
43. Challengers of the Unknown 21 (8-9/61, DC Comics)	Universal	24	6.69	June 27, 2023						3	1	1	1	5	4	1	1	2	2			1	1		1
44. Challengers of the Unknown 21 (8-9/61, DC Comics)	Universal	24	6.69	December 31, 2023						3	1	1	1	5	4	1	1	2	2			1	1		1
45. Challengers of the Unknown 21 (8-9/61, DC Comics)	Universal	25	6.62	June 17, 2025						3	1	1	1	5	4	1	1	2	3			1	1		1
46. Challengers of the Unknown 21 (8-9/61, DC Comics)	Universal	25	6.62	June 24, 2025						3	1	1	1	5	4	1	1	2	3			1	1		1
47. Challengers of the Unknown 21 (8-9/61, DC Comics)	Universal	25	6.62	July 01, 2025						3	1	1	1	5	4	1	1	2	3			1	1		1
48. Challengers of the Unknown 21 (8-9/61, DC Comics)	Universal	25	6.62	July 15, 2025						3	1	1	1	5	4	1	1	2	3			1	1		1
49. Challengers of the Unknown 21 (8-9/61, DC Comics)	Universal	25	6.62	July 22, 2025						3	1	1	1	5	4	1	1	2	3			1	1		1
50. Challengers of the Unknown 21 (8-9/61, DC Comics)	Universal	25	6.62	July 29, 2025						3	1	1	1	5	4	1	1	2	3			1	1		1
51. Challengers of the Unknown 21 (8-9/61, DC Comics)	Universal	25	6.62	August 05, 2025						3	1	1	1	5	4	1	1	2	3			1	1		1
52. Challengers of the Unknown 21 (8-9/61, DC Comics)	Universal	25	6.62	August 12, 2025						3	1	1	1	5	4	1	1	2	3			1	1		1
53. Challengers of the Unknown 21 (8-9/61, DC Comics)	Restored	1	8.00	June 27, 2011									1
54. Challengers of the Unknown 21 (8-9/61, DC Comics)	Restored	1	8.00	January 02, 2012									1
55. Challengers of the Unknown 21 (8-9/61, DC Comics)	Restored	1	8.00	July 02, 2012									1
56. Challengers of the Unknown 21 (8-9/61, DC Comics)	Restored	1	8.00	December 31, 2012									1
57. Challengers of the Unknown 21 (8-9/61, DC Comics)	Restored	1	8.00	June 22, 2013									1
58. Challengers of the Unknown 21 (8-9/61, DC Comics)	Restored	1	8.00	December 31, 2013									1
59. Challengers of the Unknown 21 (8-9/61, DC Comics)	Restored	1	8.00	July 01, 2014									1
Books	CGC Label	CGC Total	Avg. Grade	Census Date	10	9.9	9.8	9.6	9.4	9.2	9.0	8.5	8.0	7.5	7.0	6.5	6.0	5.5	5.0	4.5	4.0	3.5	3.0	2.5	2.0	1.8	1.5	1.0	0.5
60. Challengers of the Unknown 21 (8-9/61, DC Comics)	Restored	1	8.00	December 30, 2014									1
61. Challengers of the Unknown 21 (8-9/61, DC Comics)	Restored	1	8.00	June 30, 2015									1
62. Challengers of the Unknown 21 (8-9/61, DC Comics)	Restored	1	8.00	December 29, 2015									1
63. Challengers of the Unknown 21 (8-9/61, DC Comics)	Restored	1	8.00	June 28, 2016									1
64. Challengers of the Unknown 21 (8-9/61, DC Comics)	Restored	1	8.00	December 27, 2016									1
65. Challengers of the Unknown 21 (8-9/61, DC Comics)	Restored	1	8.00	June 27, 2017									1
66. Challengers of the Unknown 21 (8-9/61, DC Comics)	Restored	1	8.00	January 02, 2018									1
67. Challengers of the Unknown 21 (8-9/61, DC Comics)	Restored	1	8.00	July 03, 2018									1
68. Challengers of the Unknown 21 (8-9/61, DC Comics)	Restored	1	8.00	January 01, 2019									1
69. Challengers of the Unknown 21 (8-9/61, DC Comics)	Restored	1	8.00	July 02, 2019									1
70. Challengers of the Unknown 21 (8-9/61, DC Comics)	Restored	1	8.00	December 31, 2019									1
71. Challengers of the Unknown 21 (8-9/61, DC Comics)	Restored	1	8.00	June 30, 2020									1
72. Challengers of the Unknown 21 (8-9/61, DC Comics)	Restored	1	8.00	December 29, 2020									1
73. Challengers of the Unknown 21 (8-9/61, DC Comics)	Restored	1	8.00	June 29, 2021									1
74. Challengers of the Unknown 21 (8-9/61, DC Comics)	Restored	1	8.00	December 28, 2021									1
75. Challengers of the Unknown 21 (8-9/61, DC Comics)	Restored	1	8.00	June 28, 2022									1
76. Challengers of the Unknown 21 (8-9/61, DC Comics)	Restored	1	8.00	December 27, 2022									1
77. Challengers of the Unknown 21 (8-9/61, DC Comics)	Restored	1	8.00	June 27, 2023									1
78. Challengers of the Unknown 21 (8-9/61, DC Comics)	Restored	1	8.00	December 31, 2023									1
79. Challengers of the Unknown 21 (8-9/61, DC Comics)	Restored	1	8.00	June 17, 2025									1
Books	CGC Label	CGC Total	Avg. Grade	Census Date	10	9.9	9.8	9.6	9.4	9.2	9.0	8.5	8.0	7.5	7.0	6.5	6.0	5.5	5.0	4.5	4.0	3.5	3.0	2.5	2.0	1.8	1.5	1.0	0.5
80. Challengers of the Unknown 21 (8-9/61, DC Comics)	Restored	1	8.00	June 24, 2025									1
81. Challengers of the Unknown 21 (8-9/61, DC Comics)	Restored	1	8.00	July 01, 2025									1
82. Challengers of the Unknown 21 (8-9/61, DC Comics)	Restored	1	8.00	July 15, 2025									1
83. Challengers of the Unknown 21 (8-9/61, DC Comics)	Restored	1	8.00	July 22, 2025									1
84. Challengers of the Unknown 21 (8-9/61, DC Comics)	Restored	1	8.00	July 29, 2025									1
85. Challengers of the Unknown 21 (8-9/61, DC Comics)	Restored	1	8.00	August 05, 2025									1
86. Challengers of the Unknown 21 (8-9/61, DC Comics)	Restored	1	8.00	August 12, 2025									1
87. Challengers of the Unknown 21 (8-9/61, DC Comics)	Qualified	1	8.00	July 17, 2003									1
88. Challengers of the Unknown 21 (8-9/61, DC Comics)	Qualified	1	8.00	January 08, 2004									1
89. Challengers of the Unknown 21 (8-9/61, DC Comics)	Qualified	1	8.00	July 12, 2004									1
90. Challengers of the Unknown 21 (8-9/61, DC Comics)	Qualified	1	8.00	December 16, 2004									1
91. Challengers of the Unknown 21 (8-9/61, DC Comics)	Qualified	1	8.00	July 07, 2005									1
92. Challengers of the Unknown 21 (8-9/61, DC Comics)	Qualified	1	8.00	January 27, 2006									1
93. Challengers of the Unknown 21 (8-9/61, DC Comics)	Qualified	1	8.00	June 20, 2006									1
94. Challengers of the Unknown 21 (8-9/61, DC Comics)	Qualified	1	8.00	January 10, 2007									1
95. Challengers of the Unknown 21 (8-9/61, DC Comics)	Qualified	1	8.00	July 05, 2007									1
96. Challengers of the Unknown 21 (8-9/61, DC Comics)	Qualified	1	8.00	January 09, 2008									1
97. Challengers of the Unknown 21 (8-9/61, DC Comics)	Qualified	1	8.00	July 01, 2008									1
98. Challengers of the Unknown 21 (8-9/61, DC Comics)	Qualified	1	8.00	January 13, 2009									1
99. Challengers of the Unknown 21 (8-9/61, DC Comics)	Qualified	1	8.00	June 24, 2009									1
Books	CGC Label	CGC Total	Avg. Grade	Census Date	10	9.9	9.8	9.6	9.4	9.2	9.0	8.5	8.0	7.5	7.0	6.5	6.0	5.5	5.0	4.5	4.0	3.5	3.0	2.5	2.0	1.8	1.5	1.0	0.5
100. Challengers of the Unknown 21 (8-9/61, DC Comics)	Qualified	1	8.00	December 15, 2009									1
101. Challengers of the Unknown 21 (8-9/61, DC Comics)	Qualified	1	8.00	June 14, 2010									1
102. Challengers of the Unknown 21 (8-9/61, DC Comics)	Qualified	1	8.00	December 27, 2010									1
103. Challengers of the Unknown 21 (8-9/61, DC Comics)	Qualified	1	8.00	June 27, 2011									1
104. Challengers of the Unknown 21 (8-9/61, DC Comics)	Qualified	1	8.00	January 02, 2012									1
105. Challengers of the Unknown 21 (8-9/61, DC Comics)	Qualified	1	8.00	July 02, 2012									1
106. Challengers of the Unknown 21 (8-9/61, DC Comics)	Qualified	1	8.00	December 31, 2012									1
107. Challengers of the Unknown 21 (8-9/61, DC Comics)	Qualified	1	8.00	June 22, 2013									1
108. Challengers of the Unknown 21 (8-9/61, DC Comics)	Qualified	1	8.00	December 31, 2013									1
109. Challengers of the Unknown 21 (8-9/61, DC Comics)	Qualified	1	8.00	July 01, 2014									1
110. Challengers of the Unknown 21 (8-9/61, DC Comics)	Qualified	1	8.00	December 30, 2014									1
111. Challengers of the Unknown 21 (8-9/61, DC Comics)	Qualified	1	8.00	June 30, 2015									1
112. Challengers of the Unknown 21 (8-9/61, DC Comics)	Qualified	1	8.00	December 29, 2015									1
113. Challengers of the Unknown 21 (8-9/61, DC Comics)	Qualified	1	8.00	June 28, 2016									1
114. Challengers of the Unknown 21 (8-9/61, DC Comics)	Qualified	1	8.00	December 27, 2016									1
115. Challengers of the Unknown 21 (8-9/61, DC Comics)	Qualified	1	8.00	June 27, 2017									1
116. Challengers of the Unknown 21 (8-9/61, DC Comics)	Qualified	1	8.00	January 02, 2018									1
117. Challengers of the Unknown 21 (8-9/61, DC Comics)	Qualified	1	8.00	July 03, 2018									1
118. Challengers of the Unknown 21 (8-9/61, DC Comics)	Qualified	1	8.00	January 01, 2019									1
119. Challengers of the Unknown 21 (8-9/61, DC Comics)	Qualified	1	8.00	July 02, 2019									1
Books	CGC Label	CGC Total	Avg. Grade	Census Date	10	9.9	9.8	9.6	9.4	9.2	9.0	8.5	8.0	7.5	7.0	6.5	6.0	5.5	5.0	4.5	4.0	3.5	3.0	2.5	2.0	1.8	1.5	1.0	0.5
120. Challengers of the Unknown 21 (8-9/61, DC Comics)	Qualified	1	8.00	December 31, 2019									1
121. Challengers of the Unknown 21 (8-9/61, DC Comics)	Qualified	1	8.00	June 30, 2020									1
122. Challengers of the Unknown 21 (8-9/61, DC Comics)	Qualified	1	8.00	December 29, 2020									1
123. Challengers of the Unknown 21 (8-9/61, DC Comics)	Qualified	1	8.00	June 29, 2021									1
124. Challengers of the Unknown 21 (8-9/61, DC Comics)	Qualified	1	8.00	December 28, 2021									1
125. Challengers of the Unknown 21 (8-9/61, DC Comics)	Qualified	1	8.00	June 28, 2022									1
126. Challengers of the Unknown 21 (8-9/61, DC Comics)	Qualified	1	8.00	December 27, 2022									1
127. Challengers of the Unknown 21 (8-9/61, DC Comics)	Qualified	1	8.00	June 27, 2023									1
128. Challengers of the Unknown 21 (8-9/61, DC Comics)	Qualified	1	8.00	December 31, 2023									1
129. Challengers of the Unknown 21 (8-9/61, DC Comics)	Qualified	1	8.00	June 17, 2025									1
130. Challengers of the Unknown 21 (8-9/61, DC Comics)	Qualified	1	8.00	June 24, 2025									1
131. Challengers of the Unknown 21 (8-9/61, DC Comics)	Qualified	1	8.00	July 01, 2025									1
132. Challengers of the Unknown 21 (8-9/61, DC Comics)	Qualified	1	8.00	July 15, 2025									1
133. Challengers of the Unknown 21 (8-9/61, DC Comics)	Qualified	1	8.00	July 22, 2025									1
134. Challengers of the Unknown 21 (8-9/61, DC Comics)	Qualified	1	8.00	July 29, 2025									1
135. Challengers of the Unknown 21 (8-9/61, DC Comics)	Qualified	1	8.00	August 05, 2025									1
136. Challengers of the Unknown 21 (8-9/61, DC Comics)	Qualified	1	8.00	August 12, 2025									1

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