The manufacture date for Harrington & Richardson (H&R) firearms can typically be determined using the serial number. For the serial number A126454, it is likely that the firearm was produced in the early to mid-1950s, as H&R used the "A" prefix during that period. For a more precise date, consulting a specific H&R serial number reference guide or contacting a firearms historian could provide additional details.
Serail number and features
"AD" prefix indicates 1967
That should be 1975
About 1973
M prefix to serial # = 1952 manufacture. Jim
"AX" prefix indicates 1981
The prefix letter shows the year of manufacture. 1956 is letter S
Harrington & Richardson used the Prefix AT in 1983.
1973
How old is my Topper 88 HARRINGTON AND RICHARDSON GUN serial number
what letter or letters are in front of serial number
serial number suggests a single barrel, hinged frame Model 1908/08 shotgun - if so - 1920-25.