This specific adapter ring fits Nikon F-mount (Non-AI) film SLR cameras.

You can identify the exact model group by these specific visual features on the adapter:

• The "Rabbit Ears" Prong: The two-pronged metal fork visible at the top edge is designed strictly for early Nikon Non-AI (Pre-AI) camera bodies (such as the classic Nikon F, F2, Nikkormat FTN, etc.). It mechanically links the lens aperture ring to the camera's external meter coupling pin.

• Text Engravings: The text explicitly denotes it is a vintage Tamron Adaptall custom mount manufactured in Japan under USA. PAT. No. 3500735 built specifically FOR NIKON.

Compatibility Notes

• Vintage Film Cameras: It will mount natively and meter perfectly with Pre-1977 Nikon SLRs.

Please study the pictures carefully as they form part of the description.

I offer a no quibble returns policy so please message me if you encounter any problems.

Thanks for looking.