Cover for the MD-4 motor connection on the bottom of the F3 and F3HP.
Inexpensive replica of the original Nikon replacement part made of metal. After a long search, we have found a Swabian specialist company that manufactures this sought-after part exclusively for Nikonlassics from high-quality polyoxymethylene, a hard technical precision plastic. The advantage of the replica is that the coin slot is now also suitable for EURO coins.
The original metal part you can find
here (if available).