Once again I ask for help in identifying an inconspicuous object with a marking that has been bothering me for a long time. Any hint, tip, anything will be welcome. Thanks in advance for your interest. 
Hello, I believe it is engraved E P N S, as it was hit twice it became ineligible. I’m sure it’s not Sterling from the visible wear here, but I don’t know who the manufacturer is.
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This puzzle is all about the manufacturer…
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