Rifles and shotguns made before the 1968 Gun Control Act became law were not required to have a serial number. Yes, it is perfectly legal to own a gun that never had a serial number. It is, however, VERY illegal to REMOVE a serial number.
"P" prefix indicates 1953
Harrington & Richardson used the Prefix AT in 1983.
1973
How old is my Topper 88 HARRINGTON AND RICHARDSON GUN serial number
Cornell Publications may have a book on H&R history
1987
1971
1980
Serail number and features
May not be marked, depending on age.
The value of a Harrington and Richardson 7mm Remington mag serial number 52897 depends on its condition. This gun in excellent condition is valued between 125.00 and 200.00 as of 2014.
Immediately after 119437.