Records I have show it would have to be after 1968.
1967
1968
between 1952 and 1953
Produced in 1967 (Production run 49651LW to 53400LW )
During the last months of 1951
Made in 1951, second year of production.
To determine the production date of a Colt Commander with the serial number 56289-LW, you would typically need to consult Colt's serial number database or reach out to Colt's customer service. Generally, Colt Commanders from that era (the late 1970s to early 1980s) can be dated based on their serial numbers, but the specifics can vary. For precise information, consider checking Colt's official resources or a reputable firearms historian.
1965
You will need to get a letter from Colt or call them.
about 1953
It was made in 1968.
According to proofhouse.com, 1968 started with the serial number 53401LW, so your 53707LW was the 306th made in that year.