How do you tell the age of harrington richardson topper model shotgun?

To determine the age of a Harrington & Richardson (H&R) Topper model shotgun, you can check the serial number, which is typically located on the underside of the receiver. H&R began using a consistent serial number system in 1960, so shotguns made before that year may not have serial numbers. Additionally, consulting H&R production records or reference guides can provide specific information based on the model and serial number. Finally, examining the design features and markings can also help you estimate the age of the shotgun.