Siemens keyswitch, B, 22 mm, round, metal, shiny, special lock, with 2 keys, 3 switch positions I-O<II, left latching, momentary contact type on the right, actuating angle 2x45°, 10:30h/12h/13:30h, key removal I, note: Siemens B locking systems E1 - E25 supplied without key