No such sn in the SM Ace range
No such model number desgination was used by Colt.
you will need model name.
made by Colt about 1916
Proofhouse.com has Colt sn data
Proofhouse.com has Colt sn tables.
That Colt .45 government model was made in 1918.
Proofhouse.com has Colt sn tables.
1918
1917
By model and serial number. Go to proofhouse.com
Impossible to answer without knowing what model it is.
Impossible to answer without knowing what model you are referring to.