My father (now 84) spent his early working years at small country mining towns where he (and my mum) were the only teachers, so they had to be on time. He reasoned that kero left a slightly oily residue, so would provide some lubrication. petrol dried completely, so was not suitable, as were most of the other solvents.
I guess he was lucky that he did not try anything that dissolved the seals or glass or stripped the face clean ...
Does he qualify as an old timer I wonder ??
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