Hi,
Thanks. These markings have been reported before on other 'commercial' equipment.
I believe they point towards a button factory in former Czecho-Slowakia (hence the C.S.).
Reported:
JHH * CS * (pre-1918)
RG (ca 1918-1925?)
KM (ca 1930-1940?)
A possible button-producer may be Josef Haase from Peterswald, in a disputed CS/German area.
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