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Challengers of the Unknown #12
	DC Comics, 2-3/60

Ed Herron story		1st appearance of Challenger Mountain.
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 12 (2-3/60, DC Comics)	Universal	1	7.50	July 17, 2003										1
2. Challengers of the Unknown 12 (2-3/60, DC Comics)	Universal	1	7.50	January 08, 2004										1
3. Challengers of the Unknown 12 (2-3/60, DC Comics)	Universal	1	7.50	July 12, 2004										1
4. Challengers of the Unknown 12 (2-3/60, DC Comics)	Universal	1	7.50	December 16, 2004										1
5. Challengers of the Unknown 12 (2-3/60, DC Comics)	Universal	2	8.25	July 07, 2005							1			1
6. Challengers of the Unknown 12 (2-3/60, DC Comics)	Universal	3	8.33	January 27, 2006							1	1		1
7. Challengers of the Unknown 12 (2-3/60, DC Comics)	Universal	3	8.33	June 20, 2006							1	1		1
8. Challengers of the Unknown 12 (2-3/60, DC Comics)	Universal	3	8.33	January 10, 2007							1	1		1
9. Challengers of the Unknown 12 (2-3/60, DC Comics)	Universal	3	8.33	July 05, 2007							1	1		1
10. Challengers of the Unknown 12 (2-3/60, DC Comics)	Universal	5	8.10	January 09, 2008							1	1	1	2
11. Challengers of the Unknown 12 (2-3/60, DC Comics)	Universal	6	8.20	July 01, 2008						1	1	1	1	1	1
12. Challengers of the Unknown 12 (2-3/60, DC Comics)	Universal	6	8.20	January 13, 2009						1	1	1	1	1	1
13. Challengers of the Unknown 12 (2-3/60, DC Comics)	Universal	6	8.20	June 24, 2009						1	1	1	1	1	1
14. Challengers of the Unknown 12 (2-3/60, DC Comics)	Universal	7	8.03	December 15, 2009						1	1	1	1	1	2
15. Challengers of the Unknown 12 (2-3/60, DC Comics)	Universal	7	8.03	June 14, 2010						1	1	1	1	1	2
16. Challengers of the Unknown 12 (2-3/60, DC Comics)	Universal	8	7.90	December 27, 2010						1	1	1	1	1	3
17. Challengers of the Unknown 12 (2-3/60, DC Comics)	Universal	9	7.91	June 27, 2011						1	1	1	2	1	3
18. Challengers of the Unknown 12 (2-3/60, DC Comics)	Universal	9	7.91	January 02, 2012						1	1	1	2	1	3
19. Challengers of the Unknown 12 (2-3/60, DC Comics)	Universal	10	7.97	July 02, 2012						1	1	2	2	1	3
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 12 (2-3/60, DC Comics)	Universal	10	7.97	December 31, 2012						1	1	2	2	1	3
21. Challengers of the Unknown 12 (2-3/60, DC Comics)	Universal	11	7.93	June 22, 2013						1	1	2	2	2	3
22. Challengers of the Unknown 12 (2-3/60, DC Comics)	Universal	11	7.93	December 31, 2013						1	1	2	2	2	3
23. Challengers of the Unknown 12 (2-3/60, DC Comics)	Universal	11	7.93	July 01, 2014						1	1	2	2	2	3
24. Challengers of the Unknown 12 (2-3/60, DC Comics)	Universal	11	7.93	December 30, 2014						1	1	2	2	2	3
25. Challengers of the Unknown 12 (2-3/60, DC Comics)	Universal	11	7.93	June 30, 2015						1	1	2	2	2	3
26. Challengers of the Unknown 12 (2-3/60, DC Comics)	Universal	13	7.78	December 29, 2015						1	1	2	3	2	3		1
27. Challengers of the Unknown 12 (2-3/60, DC Comics)	Universal	13	7.78	June 28, 2016						1	1	2	3	2	3		1
28. Challengers of the Unknown 12 (2-3/60, DC Comics)	Universal	14	7.80	December 27, 2016						1	1	2	4	2	3		1
29. Challengers of the Unknown 12 (2-3/60, DC Comics)	Universal	15	7.81	June 27, 2017						1	1	2	5	2	3		1
30. Challengers of the Unknown 12 (2-3/60, DC Comics)	Universal	15	7.81	January 02, 2018						1	1	2	5	2	3		1
31. Challengers of the Unknown 12 (2-3/60, DC Comics)	Universal	15	7.81	July 03, 2018						1	1	2	5	2	3		1
32. Challengers of the Unknown 12 (2-3/60, DC Comics)	Universal	15	7.81	January 01, 2019						1	1	2	5	2	3		1
33. Challengers of the Unknown 12 (2-3/60, DC Comics)	Universal	17	7.51	July 02, 2019						1	1	2	5	2	4		1					1
34. Challengers of the Unknown 12 (2-3/60, DC Comics)	Universal	17	7.51	December 31, 2019						1	1	2	5	2	4		1					1
35. Challengers of the Unknown 12 (2-3/60, DC Comics)	Universal	17	7.51	June 30, 2020						1	1	2	5	2	4		1					1
36. Challengers of the Unknown 12 (2-3/60, DC Comics)	Universal	17	7.51	December 29, 2020						1	1	2	5	2	4		1					1
37. Challengers of the Unknown 12 (2-3/60, DC Comics)	Universal	18	7.37	June 29, 2021						1	1	2	5	2	4		1		1			1
38. Challengers of the Unknown 12 (2-3/60, DC Comics)	Universal	19	7.35	December 28, 2021						1	1	2	5	2	5		1		1			1
39. Challengers of the Unknown 12 (2-3/60, DC Comics)	Universal	19	7.35	June 28, 2022						1	1	2	5	2	5		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
40. Challengers of the Unknown 12 (2-3/60, DC Comics)	Universal	21	7.46	December 27, 2022						1	1	4	5	2	5		1		1			1
41. Challengers of the Unknown 12 (2-3/60, DC Comics)	Universal	22	7.44	June 27, 2023						1	1	4	5	2	6		1		1			1
42. Challengers of the Unknown 12 (2-3/60, DC Comics)	Universal	23	7.33	December 31, 2023						1	1	4	5	2	6		1		2			1
43. Challengers of the Unknown 12 (2-3/60, DC Comics)	Universal	25	7.43	June 17, 2025						1	2	4	6	2	6		1		2			1
44. Challengers of the Unknown 12 (2-3/60, DC Comics)	Universal	25	7.43	June 24, 2025						1	2	4	6	2	6		1		2			1
45. Challengers of the Unknown 12 (2-3/60, DC Comics)	Universal	25	7.43	July 01, 2025						1	2	4	6	2	6		1		2			1
46. Challengers of the Unknown 12 (2-3/60, DC Comics)	Universal	25	7.43	July 15, 2025						1	2	4	6	2	6		1		2			1
47. Challengers of the Unknown 12 (2-3/60, DC Comics)	Universal	25	7.43	July 22, 2025						1	2	4	6	2	6		1		2			1
48. Challengers of the Unknown 12 (2-3/60, DC Comics)	Universal	26	7.39	July 29, 2025						1	2	4	6	2	6	1	1		2			1
49. Challengers of the Unknown 12 (2-3/60, DC Comics)	Universal	26	7.39	August 05, 2025						1	2	4	6	2	6	1	1		2			1
50. Challengers of the Unknown 12 (2-3/60, DC Comics)	Universal	26	7.39	August 12, 2025						1	2	4	6	2	6	1	1		2			1

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