Mr. Delta (from Blackhawk)
Mr. Delta (from Blackhawk) appears in 3 issues in grailworth's catalog, and was first published in 1967. First appearance: Blackhawk #228 (1957), cover dated 1967.
First appearance
Every appearance we value
Blackhawk (1957) 3 issues
Character appearances from the Grand Comics Database, CC BY-SA 4.0.