This as an SX-70 Alpha 1 that was professionally modified to use 600 film (for better low light preformance).
Other changes include a black shutter button and the replacement of the original leather skins with a more grainy type leather.
The Alpha 1 is a premium version of the SX-70 that has a tripod mount and neck strap eyelets. A flash can also be attached.
Condition
The camera is fully functioning and I have used it to take pictures, although not in the last year or two.
It has a split-circle focusing screen to help with focusing.
Cosmetically, I would say it is near mint condition, although it has been modified (as stated above), so it is not in original condition.
The bellows are in good condition and are not worn or torn.
The silver body of the camera is in good condition with just a couple of minor scuffs.
The leather is in very nice condition and is not torn or peeling.
The lens appears to be clean with very little signs of dust and no signs of mold.
Happy to answer questions.