Winchester did not make a Model 1920 pump action shotgun.If you mean it was made in 1920,then it could be a model 12,or a model 1897 shotgun.I would need to know this and the overall condition of the shotgun to give you a accurate value.
The Winchester model 1901 shotgun was made between the years 1901-1920.
With the serial number that you have supplied;your Winchester model 12 pump action shotgun was made in the year 1920.
10-500 usd
Your winchester model 12 shotgun was made by winchester in 1920.
Your winchester model 1912 shotgun was made by winchester in 1920.
your Winchester model 52 was made in 1926.
1920
1920
It is the same as a Stevens Model 94. Made for Hibbard, Spencer, Bartlett & Co. between 1920 and about 1945. Value is $75 or less.
Your serial number indicates that your Winchester model 1912 shotgun was made in the year 1920.
I don't know for sure, but I have a 30 WCF Model 94 30-30 carbine # 872605 that was puchased in 1920.
It was manufactured in the year 1920.