Canadian Registered Gold Mark 2 door open face pocket watch case. It is 16 size and will fit a cylinder type Swiss watch. There is no crystal present, but the bezel is hinged onto the case. I don’t see any wear on it.
Used non-working condition, exactly as pictured. Antique circa 1887 Waltham Broadway pocket watch movement with Perfection Coin silver case. Case alone weighs 78.6 grams.