I have a 1981 Glastron bass boat and my serial number is located on the back of the boat on the port side near the top right corner. It was imprinted into the fiberglass. Mine was hard to see, so i took a piece of paper, laid it on the boat, then ran a wax pen over it to get the impression out. Worked like a charm! You might have luck finding it there.
On the front left of the block is where the number is located along with a two letter code that tells you what the motor is.
About 1978 or 1979 serial number sp83400 was the end production number for 1978............
Your serial number places the year of production as 1978.
1978
Your gun was made in 1978. The serial number is 3747 / RP represents 1978 / 199 is the product code
Your serial number doesn't have enough numbers. The starting serial number in 1978 was S01001.
Sometime after 1978.The list I have only goes to 1978. Serial # with S prefix started in 1978 with S01001
It would have to be sometime after 1978 as proofhouse.com lists Colt combat commander ending in 1978 with a serial number beginning 70SC57900
1978
That would be 1977. 1978 Since 1977 started with serial number 70SC50201 and 1978 started with serial number 70SC57900 and the Commander in question is serial number 70SC57072, it would have to been manufactured in the latter part of 1977.per proofhouse.com
1978
about 1978