800 Silver 77.2 g Diameter without crown: 52.38 mm, with crown 72.28 mm Thickness: 17.58 mm Glass diameter: 43.45 mm and dial (enamel) This pocket watch has been completely cleaned and serviced by a Jeweller, and works fine!! Very rare Swiss pocket watch This is what I can tell you about it as far as I know and have learned: Swiss moonphase pocket watch with enamel dial 800 silver Inscription: Quantième Roskopf Système Perfectionné I know it was not made by Roskopf, but it is the Roskopf system. The letter B stands for Bien or Biene (the place in Switzerland this pocket watch comes from). Number: 33691 Around period: 1893-1934? Crescent with crown stamp (German Silver mark) I see three Grouse. (Swiss Silver mark) And there is a strange symbol that looks like a double Ohm sign? Could it be a first Omega? Please see last photo!! Please have a good look at all of the photos, as this is how you will receive this rare lot. When shipped, we cannot guarantee this due to age. Errors in text reserved, scratches, oxidation, damage, wear, etc. are visible on the photos if present. Lot will be delivered registered and insured in the condition that it is in, which is assumed to be known by the buyer. This is a non-commercial sale: no guarantees or compensations.