T-Mount Lens Adapter T2 to CA Canon FD mount camera Vintage Japan

This vintage T-Mount adaptor was made in Japan and was likely sold to attach a universal T-mount Spiratone Vario-Dupliscope slide copier lens to a Canon FD mount camera body. It could have also been used to attach a Canon FD camera to a microscope or telescope T2 mount.
This example has light wear, but is all metal and ruggedly constructed and works fine. The screws can be loosened to allow the mount to match the orientation of lens aperture and focus markings. This piece has use whether you shoot analog or adapt vintage equipment to digital.
T2 Mount threads are 42mm with a 1 mm pitch, which differs from M42 mounts, which have a 0.75mm pitch.