made about 1972
1970
Proofhouse.com
Made in 1967.Second year of production.
@1957.
value depends on overall condition. serial number will give the age.
Diamondback serial # D69679. was mfg'd in 1975. made about 1976
Proofhouse.com has Colt sn data.
Sorry, but for many European firearms, there are no production records, especially if production was before the end of WW 2.
what is the manufacturing date fo a colt diamondback serial number O72239
32 caliber Safety Automatic revolver (serial number 463344). (McKinley succumbed to these wounds nearly eight days later, at 2:15 am on the 14th of ...
Basically impossible to tell a model from just the serial number.
Very little specific production data. Roughly 1930s