There seems to be very small mark above GM and 900 (on the rim).
There seems to be very small mark above GM and 900 (on the rim).Better close up is needed,though.
GM and 900 (fineness) cannot help, not even a country and let alone the maker.
Right.it is Austrian Republic hoopoe mark;number 2 indicates second standard .900 and A stands for Vienna.
There is a controversy here,though;assay office letter should be W for Wien (Vienna) but there are examples with A
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