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!
Model 83: 1936-1938
No age records, most likely a Mossberg shotgun, values $50-$75.
Depending on condition and age; 75-175 USD.
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.
Go to proofhouse.com.
burn it and if its yellow then it is pretty old
By the serial number.
The age of your shotgun is determined by the serial number that was assigned to it.if you wish to include this number in the form of a question we will be able to age your shotgun for you?
That is impossible to determine without knowing the manufacturer and model of the shotgun.
Your Western field shotgun is a Mossberg model 385K shotgun that was made for the Montgomery Wards company by Mossberg and sons.The model 385K shotgun was produced from 1960-1986,These bolt action shotguns are valued at between 75-110 dollars,for a gun with between 60%-90% of its original finish remaining and a good bore.
By the serial number
In order to determine the age of Lefever shotgun, the serial number must be known. However, Lefever shotguns were only made and distributed between 1885-1916.
it was probably made in the 1960's era, many had no serial numbers, mossberg made most of them.
there is no minimum age to get a shotgun certificate but can only purchase a shotgun or shells if 18+ there is no minimum age to get a shotgun certificate but can only purchase a shotgun or shells if 18+
here is a link to determine the age of Remington's http://oldguns.net/sn_php/remdates.php