I know very little about model 12's but I do have a 16 guage with a 24" barrel chambered for 2 9/16 old paper shell.
No.
No such model in the Winchester line. Remington has the 1100
If you are willing to get your winchester model 21,28 gauge shotgun authenticated by a winchester facory letter,then this shotgun could range in price from 25,000-30,000 dollars because it is generally believed that less that 100 model 21 shotguns were made by the winchester custom shop during the production of the winchester model 21.There was a production of 32,500 model 21 shotguns made between the years 1931-1988.Only 1100 were made by the winchester custom shop.You may get a letter on your winchester model 21 shotgun by contacting the the Cody firearms museum located in Cody,Wyoming.I would certainly have this shotgun valued by a qualified winchester collector assoc.member.
The 1100 designation for a Remington shotgun is the model number. Remington makes the 1100 model in a trap version and a field version.
$1100-1400
50-500 usd
No, a magazine extension for a Winchester 1200 shotgun will not work with a Winchester 1300 shotgun. The Winchester 1200 and 1300 have different magazine tube designs and dimensions, so they are not interchangeable.
At least $150 if is in good condition more if it is a 20G
100-1000 depending on specifics
100-1000 depending on specifics
with the L prefix to the serial number,this would indicate that your model 1100 Remington shotgun was made in 1991.
Google "Steve's Pages", or go directly to the Remington website.
$139.95