Focus: Manual by scale - 1m/3', 1.5m/5', 3m/10' and infinity.
Lens: 40mm f/2.8 Olympus D. Zuiko, 4 elements, three groups. Appears to be a front-element focusing Tessar.
Close Focus: 2.9' (0.9m).
Diaphragm: f2,8 - f/22.
Shutter: 1/40 or 1/200, automatically selected. No bulb setting.
Film Speed: Third stops from ASA 25 - 400, except ASA 32.
Filter Size: 43.5mm screw in