Mar 06, 2011 hi, i have inquired a Parker Brothers side by side 12 guage shot gun from my grandpa. I have done some research on parkerguns. org and and i am having trouble identifiying which type of Parker Brothers gun i have. i have figured that it was made in 1886. the frame size would be 1. the weight of the barrel is 3 (with a small 15 on the top right corner of the 3( in the pic)).