The caliber of this weapon is .45 ACP, or it's full name is .45 Automatic Colt Pistol.
It would be in 36 caliber or 44 caliber...
It should have the caliber marked on the barrel,such as"38 Colt New Police".
check the butt of your Colt. The serial # does not look right ????
A Colt 1908 hammerless .25 with that serial number was made in 1912
1924
Need caliber to answer.
Rifle or pistol?
Proofhouse.com has Colt sn data.
Proofhouse.com has Colt sn data.
the caliber is stamped on the gun.
A Colt 1908 hammerless .25 with that serial number was made in 1914.
A Colt woodsman .22 with that serial number was produced in late 1941.