Hi. For sale is an Alpa back adapter for attaching Mamyia RB 6x7 film backs to your Alpa camera.
I had it as part of an Alpa outfit but it never got used as I didn't have a film back available.
It's in beautiful as new condition. I'm happy to ship worldwide at buyers cost. Feel free to ask any questions.

Sorry no photo to hand but have a look here to see what it's like. https://www.alpa.ch/en/article/back-adapter-ma

Price is USD $450 (+shipping etc)

Thanks for looking.