In the picture of the muzzles it looks very much like the barrels have been shortened. If so the chokes will likely be more open than the markings suggest, perhaps none. With average overall condition, modified butt and shortened barrels this gun would bring $300-350 on a good day in my area. If the bores are pitted you can knock $50-100 off that.
Barrel length appears the same as my Model 106 -
680 mm or 26.77 inches.
I just measured them with a digital caliper, and they are very close to 16.1mm and 16.3mm (within 0.05mm), same as stamped under the barrels.
Again, thanks to everyone for the input.