I bought this in error, thinking it would fit my 645 1000s, but alas it doesn't. It has the code BF-1 on the reverse, with Mamiya on the front, and is an original Mamiya bodycap, with the usual red dot on the side to line up with camera body.

Anyone want to buy it? (UK preferred)- postage around 45p.
Or if you know what camera it fits, perhaps you can let me know...