Field and depot maintenance manual : magneto, ignition, assembly, 2920-529-8247, 2920-740-3411, 2920-737-2995, and 2920-753-9854 (Bendix-Scintilla types S4LN-32 and S6LN-32), end item application, engine, gasoline, 4-cylinder, continental model AOI-268-3A and -3B (TM 9-7605-1) ....

"June 1960."