check: http://stevespages.com/page7b.htm
Best left to a trained gunsmith.
If it is a Colt Vest Pocket model, 1921.
about 1921
If it was the Colt model 1908 hammerless .25, it was produced in 1921. In 1921 the serial #'s started with 280500 and ended with 303999.
About 89 years old. Made in 1921
Go to this site: http://stevespages.com/page7b.htm and scroll down to Colt 32 & 380 hammerless. It will give you the manual in pfd form on how to assemble & disassamble your Colt.
500-1000 usd
According to proofhouse.com, the Colt model 1908 hammerless .25 was made in 1921, making it about 88 years old
model 1908 hammerless .25 245039 made about 1921
Colt has never made a 45/410 pistol
Samuel Colt invented the Colt pistol!
You will have to get a letter from Colt to find out.