ATM 50/7 PAX, Testing the first selector

This is my 1950s telephone exchange (the codes on the relays date it to 1957, but the design dates from the 1930s) It's spent the last few years of its life in storage so needs a bit of TLC.
I'm in the process of restoring it, and have so far only restored one of the selectors to working condition.
This video is one of the first tests of the selector.