I got the two adapters bundled with an Hasselblad H- adapter for the more modern Imacon/Hasselblad backs.
Since I do not have a flexframe back and neither of the two cameras, I do not need the adapters and that the one adapter is for a 645pro is jsut my guess from what it looks like.
I might be able to check it ith a friendĀ“s Mamiya if it physically fits.
I have no idea what to ask for them, but would instead like you to make a reasonable offer if you are interested in buying one or both adapters.
cheers
Oliver