Stainless steel case. To initiate the power reserve, the watch must be wound manually. Turn the winding crown, in a clockwise direction for about 8 to 12 revolutions. Ensure that the crown is not pulled out when you are winding the crown.
CASE: SPILLMAN (ANGLED LUGS) SEI TACCHE (SIX NOTCHES) CASE BACK. COLLECTABLE CASE DESIGN-SPILLMAN CASE WITH SEI TACCHE CASE BACK. MODEL: WITTNAUER REF. MILITARY STYLE STAINLESS STEEL CASE. LOOKS MUCH BETTER THAN IN THE PHOTOS!