made about 1923
1922
1909
1916
made about 1913/14...........
1913
The Colt model 1908 hammerless .25 with that serial number was manufactured in 1919,
Depends on the model# and the condition. You failed to mention either of these.
Ruger has extensive sn data on their website.
The lower the serial number the younger the pistol is
Would need model name. There are a few pistols designated .22LR.
The only way to find out how old a Bretta automatic pistol with the serial number 605222 is to call the company. There is not a listing for Bretta's by serial numbers online.
What model?