Publisher: DC Comics
Cover Date: June 1940
Cover Price: $0.10
Writer: Bill Finger
Penciller: Bob Kane
Cover Artist: Bob Kane
First Appearance: Clayface (Basil Karlo)
Detective Comics (1937) #40 Value FAQ
How much is Detective Comics (1937) #40 worth?
As of October 2026, a near-mint (9.4) raw copy is valued around $21,000.00; lower grades range from ~$2,100.00 (Good) to ~$14,700.00 (Very Fine).
Is Detective Comics (1937) #40 a key issue?
Yes — it is a key issue, featuring the first appearance of Clayface (Basil Karlo).
Who created Detective Comics (1937) #40?
Detective Comics (1937) #40 was written by Bill Finger, pencilled by Bob Kane, with a cover by Bob Kane.
When was Detective Comics (1937) #40 published?
DC Comics published it with a June 1940 cover date, originally priced at $0.10.
What is a high-grade copy of Detective Comics (1937) #40 worth?
A Near Mint (9.4) raw copy runs about $21,000.00. Graded (CGC) copies typically sell for more — available to members.
Price guide
Estimated values by grade, full graded (slab) prices, historical trends, and recent eBay sales for this issue.
Detective Comics (1937) #40 Value — Quick Raw Price Guide
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