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Hi Gerox,
I am searching for the G or whatever but until then, just a little thing. The Hallmark is a dog, more precisely a greyhound with only a number (no letter), so this piece was made between 1937 and 1966, so no Austro-Hungarian empire anymore. :)
Cheers,
Kati

Hi,
If I see it well, it is a "P" next to the head, meaning it was made in Hungary (in case of an "A", it is from Austria). I have found this bell with an S in auction journals, the jeweler was working in approx 1910 in Hungary. So the bell with the S itself is the maker's mark.

Hi, SH is the maker hallmark of Hann Sebestyén (1644-1713), a Hungarian jeweler.