This is a pretty hard to find adapter that allows you to attach a roll film back to a Mamiya RB67 with the addition of a P adapter (which I have at least two of for sale). The Mamiya Press backs are known for having better film flatness than most other comparable backs of the same format (including RB67). Using this on an RB67 you could theoretically shoot larger than 6x7 with a 6x9 back. Not sure how much coverage you'd get exactly. This thing is basically in perfect condition, I'd say Mint-. Functions perfectly.
Given the relative rarity and condition of this item, I'm looking to get $80 shipped from Ohio. If that sounds steep, I'm always open to reasonable offers, so message me and make me an offer.
*I will give you a discount on anything you buy in combination with other items I'm selling.