German made, manually wound, 35 mm/6.47 mm, 4Hz (28,800 vph), power reserve 45-hours approx. (44:40), screw balance with 18 regulation screws, Anachron balance spring, Incabloc shock protection, 58 jewels (including 4 gold chatons). German silver three-quarter plate with stripes, and chamfered and polished edges, hand polished blued screws, and hand engraved balance bridge.