My guess would be ,if you came by it legally, to call the New York Police Department Information Bureau. If there is such a thing. contact NY city poice depart and pose the question to them
If you do a web search for Colt 1903 grips, you will get a starting point. If you do a web search for Colt 1903 grips, you will get a starting point.
Is this a Colt 1903 Hammerless .32? If so, according to the information found at http://www.proofhouse.com/colt/index.html it appears your Colt 1903 was manufactured in 1920.
Your 1903 colt hammerless 32. was made by colt in 1920.
Could be the owner's, could be an inspector initials.
Your colt model 1903 hammerless 32cal was made in 1916.
A Colt 1903 hammerless .32 with that serial number was made in 1919.
1903
1934 for the Colt 1903 hammerless .32.
You could go to proofhouse.com to look it up.
.380 1903
The date of manufacture of Colt 1903 Hammerless .32 is 1916.(193000-234999)
Found a Colt 1903 hammerless with that serial number made in 1917.