Call Colt with the sn and they will tell you.
the colt mark 4 is a 1911 model pistol acp (automatic colt pistol ). 80 series was made during the 1980's but was not made in 40cal. from the colt factory, only in 45acp and 38 super.
Colt has never made a 45/410 pistol
AFAIK, Colt never made a single shot pistol
Colt Peacemaker refers to a revolver. 70 series pistol in 22 refers to a semi-automatic. Which one do you mean?
You will have to call Colt to find out.
made by colt in 1918................
If you call Colt they will tell you when it was made.
are you sure it's not BP for black powder ??? it means barrel bushing, the pistol is a transition between colt 1911 commercial and series 70. your pistol was probably made in 1969.
1974
Proofhouse.com has Colt sn data.
no colt made the 1902 pistol
@1969