Aircraft Clock, 8-Day, Center Knob, on Wooden Stand P-39 Both are labeled "AF US

Both are labeled "AF US ARMY" on their faces

and aircraft systems

part number 671CPU-19-D15

plus original instructions

Aircraft Clock, 8-Day, Center Knob, on Wooden Stand P-39 Both are labeled "AF USThis is a WWII era US military 8 Day aircraft clock, with a center knob, mounted in a wooden stand, likely walnut or mahogany judging by its grain. Although the identification label is missing, we believe that it is likely an Elgin made between 1931 1939, but interested buyers should confirm this on their own. The numerals 3, 6, and 9 are painted in Munsell green, indicative of use for US Navy aircraft. The center knob will adjust the time when pulled