To determine the manufacture date of a Hopkins and Allen firearm with the serial number K0402, one would typically need to consult specific production records or databases that track serial number ranges and their corresponding dates. Unfortunately, detailed records for Hopkins and Allen are not widely available, as the company ceased operations in the early 20th century. You may want to reach out to firearm historians or collectors, or check with specialized forums or organizations dedicated to antique firearms for more precise information.
No definitive sn data published.
No sn data published that I know of.
No published sn data. Late 1800's or so
Check on line auctions to see what they are bringing in the current economy
24647
You need to provide the serial number
If the shotgun is marked Hopkins and Allen Manufacturing Company, Norwich Conn. it was made between circa 1880-1885 and 1898. If marked Hopkins and Allen Arms Company, it was manufactured between 1898 and 1915. No records are available to give a more exact date of manufacture.
1983
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If it is Hopkins & Allen MFG Co, sometime between 1868 and 1898. Hopkins & Allen ARMS Co would be from 1898 to 1915. A 16 gauge would more likely (but not certainly) have been made after 1900.
1870-1910 or so
Impossible to value with just a serial number.