Challengers of the Unknown #73 (1970) for Sale - Where to Buy

Identification plate

Match the book in your hand against this plate before paying an edition-specific price.

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Seq	Story	Type	Pages	Credits	Characters
0	Curse of the Killer Time Forgot!	cover	1	pencils: Nick Cardy; inks: Nick Cardy; letters: Gaspar Saladino	Ace Morgan; Rocky Davis; Prof Haley; Red Ryan; Corinna Star; Machu
1	The Curse of the Killer Time Forgot!	comic story	21.83	script: Denny O'Neil; pencils: George Tuska; inks: George Tuska; letters: Ben Oda	Challengers of the Unknown [Ace Morgan; Rocky Davis; Prof Haley; Red Ryan; Corinna Stark]; Machu; Major Cheever
2	Detective Comics	promo (ad from the publisher)	0.33
4	-	letters page	1	script: Murray Boltinoff, George Tuska
5	-	statement of ownership	0.33	letters: typeset
6	A Flash of Memory!	comic story	2	script: Murray Boltinoff; pencils: Dick Dillin; inks: Vince Colletta; letters: Milt Snapinn

Plus 0.5 pages of advertisements and other matter across 1 sequence, as published.

Check the price box: Marvel ran 30-cent and 35-cent test-market price variants in 1976-77.
Canadian and Whitman editions exist for many bronze books; match the barcode area to the plate.
Look for Mark Jewelers inserts and date stamps - they affect collector preference, not authenticity.

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