Engine serial number LDA5753b3 breakdown...
L = 1953 Model Year
D = 5000 Series (COE) with 235 engine
A = Flint engine Plant
575363 = unit number starting at 1001
Chassis serial number 21KC10 2272
Chassis unit numbers start at 1001, so you have the 1,272nd KC built at Plant 21 (Janesville, Wisconsin). It was built in October 1939.
Mike B
