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Hardy Boys #4
	Gold Key, 1/71

		Partial photo cover.

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. Hardy Boys 4 (1/71, Gold Key)	Universal	1	9.40	July 01, 2001					1
2. Hardy Boys 4 (1/71, Gold Key)	Universal	1	9.40	January 27, 2002					1
3. Hardy Boys 4 (1/71, Gold Key)	Universal	4	9.45	July 17, 2003				1	3
4. Hardy Boys 4 (1/71, Gold Key)	Universal	5	9.44	January 08, 2004				1	4
5. Hardy Boys 4 (1/71, Gold Key)	Universal	6	9.37	July 12, 2004				1	4		1
6. Hardy Boys 4 (1/71, Gold Key)	Universal	6	9.37	December 16, 2004				1	4		1
7. Hardy Boys 4 (1/71, Gold Key)	Universal	6	9.37	July 07, 2005				1	4		1
8. Hardy Boys 4 (1/71, Gold Key)	Universal	11	9.30	January 27, 2006				1	8		1	1
9. Hardy Boys 4 (1/71, Gold Key)	Universal	11	9.30	June 20, 2006				1	8		1	1
10. Hardy Boys 4 (1/71, Gold Key)	Universal	11	9.30	January 10, 2007				1	8		1	1
11. Hardy Boys 4 (1/71, Gold Key)	Universal	11	9.30	July 05, 2007				1	8		1	1
12. Hardy Boys 4 (1/71, Gold Key)	Universal	11	9.30	January 09, 2008				1	8		1	1
13. Hardy Boys 4 (1/71, Gold Key)	Universal	11	9.30	July 01, 2008				1	8		1	1
14. Hardy Boys 4 (1/71, Gold Key)	Universal	11	9.30	January 13, 2009				1	8		1	1
15. Hardy Boys 4 (1/71, Gold Key)	Universal	11	9.30	June 24, 2009				1	8		1	1
16. Hardy Boys 4 (1/71, Gold Key)	Universal	11	9.30	December 15, 2009				1	8		1	1
17. Hardy Boys 4 (1/71, Gold Key)	Universal	11	9.30	June 14, 2010				1	8		1	1
18. Hardy Boys 4 (1/71, Gold Key)	Universal	11	9.30	December 27, 2010				1	8		1	1
19. Hardy Boys 4 (1/71, Gold Key)	Universal	11	9.30	June 27, 2011				1	8		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. Hardy Boys 4 (1/71, Gold Key)	Universal	11	9.30	January 02, 2012				1	8		1	1
21. Hardy Boys 4 (1/71, Gold Key)	Universal	12	9.34	July 02, 2012			1	1	8		1	1
22. Hardy Boys 4 (1/71, Gold Key)	Universal	12	9.34	December 31, 2012			1	1	8		1	1
23. Hardy Boys 4 (1/71, Gold Key)	Universal	12	9.34	June 22, 2013			1	1	8		1	1
24. Hardy Boys 4 (1/71, Gold Key)	Universal	12	9.34	December 31, 2013			1	1	8		1	1
25. Hardy Boys 4 (1/71, Gold Key)	Universal	12	9.34	July 01, 2014			1	1	8		1	1
26. Hardy Boys 4 (1/71, Gold Key)	Universal	12	9.34	December 30, 2014			1	1	8		1	1
27. Hardy Boys 4 (1/71, Gold Key)	Universal	12	9.34	June 30, 2015			1	1	8		1	1
28. Hardy Boys 4 (1/71, Gold Key)	Universal	12	9.34	December 29, 2015			1	1	8		1	1
29. Hardy Boys 4 (1/71, Gold Key)	Universal	12	9.34	June 28, 2016			1	1	8		1	1
30. Hardy Boys 4 (1/71, Gold Key)	Universal	12	9.34	December 27, 2016			1	1	8		1	1
31. Hardy Boys 4 (1/71, Gold Key)	Universal	13	9.35	June 27, 2017			1	1	9		1	1
32. Hardy Boys 4 (1/71, Gold Key)	Universal	13	9.35	January 02, 2018			1	1	9		1	1
33. Hardy Boys 4 (1/71, Gold Key)	Universal	13	9.35	July 03, 2018			1	1	9		1	1
34. Hardy Boys 4 (1/71, Gold Key)	Universal	17	9.44	January 01, 2019			4	2	9		1	1
35. Hardy Boys 4 (1/71, Gold Key)	Universal	18	9.46	July 02, 2019			5	2	9		1	1
36. Hardy Boys 4 (1/71, Gold Key)	Universal	20	9.41	December 31, 2019			6	2	9		1	1	1
37. Hardy Boys 4 (1/71, Gold Key)	Universal	21	9.41	June 30, 2020			6	3	9		1	1	1
38. Hardy Boys 4 (1/71, Gold Key)	Universal	21	9.41	December 29, 2020			6	3	9		1	1	1
39. Hardy Boys 4 (1/71, Gold Key)	Universal	21	9.41	June 29, 2021			6	3	9		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. Hardy Boys 4 (1/71, Gold Key)	Universal	21	9.41	December 28, 2021			6	3	9		1	1	1
41. Hardy Boys 4 (1/71, Gold Key)	Universal	21	9.41	June 28, 2022			6	3	9		1	1	1
42. Hardy Boys 4 (1/71, Gold Key)	Universal	21	9.41	December 27, 2022			6	3	9		1	1	1
43. Hardy Boys 4 (1/71, Gold Key)	Universal	22	9.35	June 27, 2023			6	3	9		1	1	2
44. Hardy Boys 4 (1/71, Gold Key)	Universal	22	9.35	December 31, 2023			6	3	9		1	1	2
45. Hardy Boys 4 (1/71, Gold Key)	Universal	24	9.33	June 24, 2025			7	3	9		1	2	2
46. Hardy Boys 4 (1/71, Gold Key)	Universal	24	9.33	July 01, 2025			7	3	9		1	2	2
47. Hardy Boys 4 (1/71, Gold Key)	Universal	24	9.33	July 15, 2025			7	3	9		1	2	2
48. Hardy Boys 4 (1/71, Gold Key)	Universal	24	9.33	July 22, 2025			7	3	9		1	2	2
49. Hardy Boys 4 (1/71, Gold Key)	Universal	24	9.33	July 29, 2025			7	3	9		1	2	2
50. Hardy Boys 4 (1/71, Gold Key)	Universal	24	9.33	August 05, 2025			7	3	9		1	2	2
51. Hardy Boys 4 (1/71, Gold Key)	Universal	24	9.33	August 12, 2025			7	3	9		1	2	2
52. Hardy Boys 4 (1/71, Gold Key)	Universal	24	9.33	August 19, 2025			7	3	9		1	2	2

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"CGC Census Analysis" is provided by Greg Holland (©2003-2025).
Data is sourced from the public CGC census (© Certified Guaranty Company, LLC.)
Used with permission of CGC since 2003. Data is from July 01, 2001 to August 19, 2025.
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