Speak of the Devil. Here's a Thos. Forsyth Bar-Action hammergun sold several years ago. Without seeing the proofs, i'd say that the odds were good that this gun is considerably younger than your back-action sidelever.

http://www.nadeausauction.com/lotdetails/?lot=96698

Last edited by Ken61; 03/31/15 07:36 AM.
I prefer wood to plastic, leather to nylon, waxed cotton to Gore-Tex, and split bamboo to graphite.