Going back about 64 years I was an apprentice and I had to produce some aluminium sealing washers for the aircraft industry.
Producing them and parting them off was not a problem but holding them to finish the parted face was. The foreman then explained how he had done a few years before.
An...
I am 86 years old and do not have the facilities to model anymore so I have taken to creating models on CAD.
I have attached screen shots of a model I made from photo's of an engine an uncle of mine used to own, hope it is of interest