what is the manufacturing date fo a colt diamondback serial number O72239
Diamondback serial # D69679. was mfg'd in 1975. made about 1976
You will have to call Colt. Published sn data does not show any Diamondback with a sn starting with a P
1977
Post 78
On the butt
I found a Colt diamondback with that serial number made in 1971.
Proofhouse.com has Colt sn tables. You can also call Colt and they will tell you.
made about 1977
Around 1968.
made about 1972
According to profhouse.com, it was produced in 1977