The Petri Penta V6 (also sold as the Petri Flex V6) is a 35mm single-lens reflex camera made by Kuribayashi/Petri of Japan, introduced in the mid-1960s. It was positioned as an affordable amateur SLR using the Petri breech-lock bayonet mount.

With only one verified UK auction record on file, hammer-price evidence for what a Petri Penta V6 sells for is thin: the single result on record is £34 at saleroom level (wholesale, excluding commission). On that basis the camera's value today sits in the budget tier of vintage Japanese SLRs, and a confident price band cannot be quoted without further auction data.