I hope someone can recognise the hallmarks on this double sided pendant.
The chain is marked 925 and what looks like 150 or ISO.
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In this case I am absolutely helpless. I am counting on the help of excellent colleagues.
Thank you for the quick response.
Since it has a Greek key on one side I thought it might be from Greece, but I can’t seem to find any images of Greek silver marks.
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Even the Google “image search” option didn’t produce the expected results… Sorry.
925, omega or a goblet sign, ?, 75
Ok, it’s from Greece, Athens.
Jewellery Marking and Code Numbers by Prefecture - EEA
Great work… Thank you!
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U welcome!
Omega (capital) Tau (cursive) stands for Athens and number 75 was assigned to the maker (workshop code/mark) - similar system in Italy with region abbreviation and registered number.
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Well done Bart, I was gonna guess Greece but you beat me to it 
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Thank U, bro! Alan, I’m glad you see and appreciate my work. It’s very important to me. 
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I appreciate everyone here, I as well as others here have learned a lot from yous guys. Thank you
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