This sale is for a really excellent condition original copy of the Mamiya C330 Instruction Manual, obviously intended for use with the C330 camera.
These original manuals are very hard to find; this one is marked/creased on the front page but otherwise near mint. Of course you can download it for free from the Downloads section, but many photographers prefer to have an original copy. Try finding another one – these are almost impossible to find.
Hundreds of original Mamiya and Bronica manuals/information sheets in stock. Please ask if you are looking for an original manual as I do not have the time to list them.