J J Schwitzer, St Gallen (Switzerland) twin key wind 8 jewel case. Not hallmarked but was tested with an X-Ray machine & came up as .800 Silver. The case is very large and has an approx outer diameter of 63mm with a weight of 100 grams. Twin key wind with the inner case back superbly engraved as per the first photo, the case back is also engraved with a Farm theme. Fitted with original thick glass, both case back & front snap shut ok, case has minor wear & some small dents.