Thanks for the link, Francois.
In the last three weeks I've fixed an Agfa Billy Jgetar 6x9 (1930), a Meopta Flexaret IIIa TLR (1950), and a Rolleiflex T TLR (1960).
Shutter problems, winder problems, lens problems, and in all cases problems due to little worse than poor maintenance over the years. Given the quality and ISO speeds of modern film these old cams are magnificent to use.
Keep them alive, I say.