I recently bought a very nice side by side 20 gauge shotgun at a yard sale and i was hoping i could get some help on finding out when it was made. on the barrels its marked barrel proof tested 20 gauge 23/4 inch chamber selected forged steel. on the its marked 20 V A J j on the left side of the stock its marked Stevens model 311 Savage arms corporation Chicopee falls MASS. U.S.A. on the right side its has the number 5100 and on the inside of the stock its has the letters V J A J b C any and all help with this would be greatly appreciated sincerely and respectfully mg357