SEIKO Cal.4206 17 jewels Japanese Automatic.
Functions:
Day/Date calendar, window display.
Mineral glass. Flat profile.
Luminous ( radiation-free LumiBrite ) hour markers. Charcoal gray color.
Hands:
Steel color. LumiBrite radiation-free luminous filled.
Case Back:
Solid Stainless steel. Screw-down style ( threaded ).
Combination satin/polished finish. Solid Stainless steel.