The best way to find the age of a Mossberg 500A Shotgun is simply to call the company's customer service line and have the serial number and model number handy. Mossberg has yet to publish a list of their serial numbers in relation to the dates of manufacture.
1936
The thickness of the shell (lip) increases with the age. This is how you can determine the age of the conch.
Geologists determine absolute age of rocks by using radioactive dating.
age
no, the relative age
You will have to call Mossberg
I cant tell you how to exactly age your mossberg shotgun, however i do know that the earlier model mossbergs do not have ported barrels. I know this does't exactly help out much, but mossberg does offer a porting and refinishing service for a LOW price!
H 302444
Model 83: 1936-1938
No age records, most likely a Mossberg shotgun, values $50-$75.
Depending on condition and age; 75-175 USD.
1940
The Mossberg model 183D was made from 1948-1985.These shotguns are valued at between 75-110 dollars.
The western field model 172B was made for Montgomery Wards(Western Field) by the firm Mossberg and sons.The Mossberg model 395K and your shotgun are one and the same.The Mossberg model 395K was made from 1963-1983.
This shotgun is a mossberg model 85. made between 1934-1937. dont know value.
The Mossberg 185k 20ga shotgun was manufactured from 1947-1950 so it's anywhere from 62-65 years old and it's worth from $50-$200 depending on condition.
See link.