55hp Montgomery Ward, Sea King

[rfatelo]

I JUST BOUGHT AN OLD SEA KING 55HP MOTOR. RUNS GREAT. I JUST AM NOT
SURE OF THE YEAR. I'VE BEEN TOLD TO REVERSE THE LAST TWO SERIAL NUMBERS. IS THAT RIGHT? (SERIAL # 47X 20586 MOD # VWB 52056 ).
WOULD LIKE TO KNOW SO I CAN TRY TO GET A REPAIR MANUAL.
THANKS