75 Ohm Terminators, BNC Male, Various Brands

These were standard for most composite video equipment before built in switched termination became the standard.   Most of these were made by Canare, Tektronix, Grass Valley, Sony, and other well known manufacturers of Switchers and processors.

Most of these are Nickel plated over brass, some with silver and some with gold center pins. 

We have a small quantity of these with a tap for signal monitoring, as seen in the first photo, 3rd from the left.