Upon first glance this looks like one of the Dave Mann/Roth posters; The Blackboard Cafe - from Choppers Magazine. However, this version ... | Instagram
CHOPPERS MAGAZINE MARCH 1970 BIG DADDY ED ROTH GORDON THE GOAT ROBINSON | eBay
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Ed "Big Daddy" Roth Mailbox chopper - WIP: All The Rest: Motorcycles, Aviation, Military, Sci-Fi, Figures - Model Cars Magazine Forum
ED 'BIG DADDY' ROTH CHOPPERS REVISTA SETEMBRO 1969 CUSTOM STREET CHOPPERS | eBay