made about 1929
A Colt 380 hammerless with that serial number was made in 1915.
The Colt 1908 hammerless .380 with that serial number was made in 1937.
the model 1908 hammerless 380 with serial # 60093 was made about 1923
Made in 1916.
about 1916............................
made 1927
The Colt 1908 hammerless 380 with serial number 39901 was made near the end of year 1920 as the year 1921 started with serial number 40000.
Only Colt knows, and they might not even know to the last one.
check with: felix@bedians.com
Based on proofhouse.com, it was made in 1912 as 1913 starts with 12700.
Found a Colt 1903 hammerless with that serial number made in 1917.
@1911