This is a Vulcan grade Parker with serial # 110413. I am wondering what the # 8 means that is in the area where the frame size usually is. The gun is advertised as a 12 ga. Did they make a 12Ga. on a size 8 frame? I tried to post just the picture of the barrel flats, but it wouldn't let me. Next to last picture.
https://www.gunbroker.com/item/1109759158