Nikon F / M S SP Rangefinder Rare Standard Hotshoe Adapter with Cord
This is a rare early adapter that puts a BC-5 with the standard shoe on the F and Rangefinder models. It has a synch cord, something that I have not seen on any other models. Note that the BC-5 has an unusual contact pattern and this adapter will not work with a modern flash.
The adapter is mint in case (non-Nikon, with another adapter.