Description Ballistic Fuze Computer from USS Nevada BB36. Ford Instrument Company. Mounted on wooden frame and housed in steel protective shipping case. Nameplate on outside of shipping case reads: U.S. Navy Bureau of Ordnance POWDER FUZE BALLISTIC COMPUTER FOR COMPUTER MK 1 MOD 4 SERIAL NO 161 CONTRACT NO 88709 GROSS WEIGHT 37 LBS. INSPECTOR HDB USN DATE 1942 MANUFACTURED BY FORD INSTRUMENT CO., INC. LONG ISLAND CITY, NEW YORK Stenciled on outside of shipping case: U. S. S. NEVADA Nameplate on computer assembly reads: Powder Fuze Ballistic Computer Bur. Ord. Drg. 209665 --------- - 2 For Computer Mk 1 Mod 4 Serial No. 161 For Installation Instruction See OD -------- Chapter VIII Identification plate on computer assembly reads: Bur Ord Assembly Drg No 209665 2 - 2 Serial No 30 This computer is designed to be used as an assembly in a larger computer. It includes a 60 Hz motor, a 3-dimensional cam, and a gear case containing at least two differentials to perform addition /subtraction. A mechanical counter displays the range in yards.