help on buying a Mamiya RB67 professional S with 90mm lens

It's a bit quirky but you will love it. I was gifted one and have found myself shooting less and less digital.

See if you can score a Polaroid back for it, I have one and it takes Fuji FP film. There are a multitude of backs for it, 220, 645, 70mm aerial, I think they made a 35mm back too didn't they?

I would love a polaroid back. But as I understand it I'm getting an older model of the SWC that can't fit the Polaroid back. At a certain point there were some changes to the body to accommodate the polaroid back:

"In 1980 the SWC was modified to take a Polaroid magazine and so became the "SWC/M." This conversion can still be retro-fitted by Hasselblad service centres and provides a modified viewfinder seat and tripod coupling plate to accept the Polaroid back as well as a film winding crank with ratchet action."
(source: nice article on https://www.facebook.com/notes/phot...blad-swc-supreme-for-50-years/189066224478660

This camera has lens serial number 3571235. I'm not sure but if I'm right this camera was made in 1963.