I have inherited a Iver Johnson's SxS Hercules Grade double barrel shotgun, and I know nothing about it, gauge, choke, nothing...lol. This is what I do know, 2 triggers, 28" barrels, on the right side it is stamped Iver Johnson Arms and Cycle Works Canada Ltd Montreal Made in Cobourg, on the left side it is stamped Hercules Grade, what I believe would be the S/N is stamped 2848, no patent pending dates that I can find, also has an F stamped on the underside left barrel and an M stamped on the right, pistol grip cap says Iver Johnson, and the butt cap says Iver Johnson with an Owl. If anyone has any info could point me in the direction of where I could find some, it would be greatly appreciated.