Both marked sterling 925 with single emblem after
Too much reflection in your picture of the mark. Try taking it in daylight and have several tries, if necessary, to get the mark in focus.
Now isn’t better, but I think is german silver, because I saw the “Crescent and crown”.
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You can try to find the manufacturer by looking at the list letter by letter here
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It’s Otto Wolter of Schwäbisch Gmünd, active 1875-1991.
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