The question can't be answered without knowing who made the shotgun. Even then, information may not have been published.
Utility grade shotgun, 50-100 USD or so
Double barrel? Single barrel? Model? Need more information in order to be able to answer.
Look up the Marlin shotgun with the same model number.
You will need to include the shotgun model number,or model name.Type of shotgun(single shot,pump action,double barrel,or semi-auto)along with the serial number that you have provided to get the correct age of your Winchester shotgun.
Since you do not say, whether your Harrington & Richardson is a pistol, rifle or shotgun and you do not show a letter prefix to the serial number, I can only give you limited information based on a Model 48 Topper Single Shot Shotgun which was manufactured for a period of 14 years between 1943 and 1956. I hope this helps, until you can supply more information on your shotgun.
What shotgun?You need to list the maker of the shotgun,model number if there,type of shotgun(single shot,pump,semi-auto,over under,side by side.)gauge of shotgun(410,28,20,16,12)so that we can help you.
There were no serial numbers stamped on the original Winchester Mdl. 37, single shot shotgun.
when did spring make 12g single barrel shotgun serial number 30368