I learnt the basics of milling on war finish machines. The training shop had, I think 10 mills of which three or four were war finish, one was war reparation. The rest were very new, Elliot, Bridgeport and A and S.
The war machines were in good shape, mostly, when it might be thought they would be clapped out. One of them had well worn leadscrews, myself and another apprentice were tasked with sorting out new leadscrews. Rather than buy or make new, we reconditioned the worn (metric) screws by turning the O/D down a very small amount. Then into the thread milling machine to “thin” the thread to remove the wear. New nuts made to suit.
The main production workshop had several large war reparation lathes, all were very tired and gradually replaced over the next few years.
There was also an “SIP” jig borer that came from the war reparation route. The story that went with it was that the Germans hid the machine down a mine just before they were overrun by allied forces. The plan was to use it after the war to help get the country back on its feet, that didn’t happen!
Thanks for opportunity to take a walk down memory lane, hope I haven’t bored you.