I'm renovating some 022 switches for sale and just by chance one pair is prewar set, which I can tell by the "Automatically Controlled" label. As I was lookingin my switch parts stock to replace a broken motor cover, I noticed that there are two cover variations. There is a type difference in the part number cast on the under side of the cover. On some, the numbers are sans serif type and on others the type is serif. As I am trying to make this pair as close as possible to the original, IO would like to use the right covers. Can someone tell me which type face is the original and which came later ?
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