Immediately after 119437.
How old is my Topper 88 HARRINGTON AND RICHARDSON GUN serial number
There are some published serial number lists.
70-100 yrs ago
Since it has a serial number, it was made after 1968. They were made at least through the 1990's, but I know of no source of serial number dating info for recent H&R guns. * Harrington & Richardson manufactured the shotgun in 1974.
Unaware of any model by that number. Do you mean 11-48?
Seldom exceeds 100 USD
Harrington & Richardson used the Prefix AT in 1983.
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.
Your serial number letter prefix of the letter A means that your H&R shotgun was made in the year 1940.
"P" prefix indicates 1953
serial number suggests a single barrel, hinged frame Model 1908/08 shotgun - if so - 1920-25.