Tested and fully working.
The camera has a small defect.
It has a little bit of black tape on the back right side. This doesn't affect the functionality in any way.
The Mamiya 645 camera systems are a series of medium format film and digital cameras and lensesmanufactured by Mamiya and its successors. They are called "645" because they use the nominal 6 cm x 4.5 cm film size from 120 roll film. They came in three major generations: first-generation manual-focus film cameras, second-generation manual-focus film cameras, and autofocus film/digital cameras.