I have a couple of Winchester Model 12's for sale. They are both 16 gauge and both decent condition.
#1- Top one. Produced in 1920 based off the website linked below. It has a modified Choke and barrel says Nickel steel. It has a 26" barrel thats actually in pretty good condition in and out. Has aftermarket red pad. Looking for $350 OBO on this one.
#2- Bottom one. Produced in 1959 the best I can tell. Its not in as good of condition as the other one but still nice. It has a 28" barrel. Modified choke. Good condition. Looking for $300 on this one.
Both in Granbury Honestly the prices for these are kinda hard to nail down but looking at finished GB auctions I think I am close. If not feel free to offer up. http://guncollectionsonline.com/model12.htm