about 1921
You can find out at Proofhouse.com in the Colt tables.
You must call Colt to find out.
if it"s model 1908 hammerless then made about 1921
1918
Go to: www. proofhouse.com with serial number.
1918
1934 for the Colt 1903 hammerless .32.
You will have to call Colt to find out.
Around 1919 for the Colt 1903 hammerless .32
Made in 1916, if 1903 hammerless .32
Can't answer without model name. Go to proofhouse.com and look it up.
It tells the year of manufacture of a Colt.