Manufactured as the Model 1400 from 1964-1968. The action release was redesigned and a different checkering pattern was used. These were called the Model 1400 Mk II until 1972, then the 'MK II' was dropped and it was the Model 1400 again. The entire series was dropped in 1994. sales@countrygunsmith.net
The number 1400 refers to the Model number of your Winchester shotgun.
The Winchester model 1400 shotgun was made by Winchester from 1964-1981.
Your Winchester model 1400 semi auto shotgun is gas operated.
Your Winchester model 1400 semi-auto shotgun is valued at between 140-220 dollars,depending on overall condition and a good bore.
The Winchester model 1400 Mark II was only produced during the years 1968-1972.That is the time frame of your shotguns manufacture.
Your Winchester model 1400 MK2 was made between the years 1969-1972.These were the only years that Winchester stamped there model 1400 with the MK2.
How old and how much in value is a Winchester semi- auto 12 gauge shotgun model 1400 MK II serial number 483251
None
I can say that Winchester made the model 1400 shotgun from 1964-1981.But they did not record the serial numbers by year of production.
Best to ask a gunsmith.
The model 1400 was made from 1964 to 1969...then it became the model 1400 MK II until 1972 then went back to model 1400 until 1974 then discontinued.
It is the Winchester model 1400, made for Sears.