You must call Colt to find out.
about 1921
You can find out at Proofhouse.com in the Colt tables.
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.
You will have to call Colt
The date of manufacture is determined by the Colt model type and serial number. See: www.proofhouse.com/colt/index.html
Made in 1916, if 1903 hammerless .32
Can't answer without model name. Go to proofhouse.com and look it up.
What is the manufacture date of a Colt AR15 rifle serial number 192754 model SP1
Around 1919 for the Colt 1903 hammerless .32