Hello, that is Garagnon from Pforzheim, Germany. This mark was used from the early 1930ies to the late 1960ies. The use of sterling is uncommon in Germany before 1945. My guess is, this was made in the 1950ies or 1960ies. The company is listed in the directories until the late 1960ies, it is no longer listed in the 1970 directory. Best wishes, Bahner