It can be anywhere from 95 to 120 years old, and depending on the condition and model, it could be worth up to $1000.
Try e-gunparts.com
$500+ depending on condition
Single barrel, under $100. Double-barrel up to $200 unless heavily ornamented.
Turn of the century, inexpensive.
Between 35-60 dollars.
Typically, up to $250. Rare and heavily engraved special versions would bring more.
numrich
Not listed in any reference I have seen.
Hopkins and Allen made double barrel shotguns from 1902-1909,they made single shots from 1887 to the early 1900,s.they also made the 38xl and 44xl drop block shotguns from 1890,s thru 1914.
There is no serial number data for the Company Hopkins and Allen in the private sector available.This firm was in business from 1867-1916.No laws required serial numbers at that time,and those that were marked with a serial number have no records remaining today.If you have a single shot shotgun,these were made from 1887-1902.If the markings say Hopkins and Allen Manufg.Co.Norwich,Conn on the gun then this was made from before 1896.If you have a double barrel shotgun,then these were made from 1902-1916,when they went out of business.
I have a nitro hunter 12 ga serial 555281 $50 for the whole gun
Start with gunpartscorp.com - they sometimes have Hopkins & Allen parts