Anyone have more info on the ETC Hawken?
Yep
Is it stamped J&S Hawken?
It is. In fact, it's double stamped. By that I mean it looks like the stamp bounced of the first strike and when it was struck again it was misaligned.
Walnut stock?
The museum record states it is mahogany. It could very well be. Everyone I've asked, that has seen it, thinks it's black walnut. The museum tech we worked with stated that a sample was never sent for testing and he didn't know were the mahogany notation originated.
Halfstock or full stock?
Half stock
Type or shape of breech? Snail or “conquistador helmet?”
"Conquistador helmet". It's identical to some photos I've seen of other guns. One was a pistol by William Chance that was made in England. The bolster is forge welded directly to the barrel. It does not have a patent (or more properly... false patent) breech. The breech plug is simply the screw portion of a conventional breech plug with a hook at the back to engage the standing portion of the tang. A bore scope confirmed that the face of the breech plug is flat and not cupped.
Shape of tang?
The full length of the tang from the front of the standing portion to the back tip of the tang is 3.028". It's a short (or mid-length) tang with one tang bolt entering through the tang and threading into the trigger plate in front of the front trigger.
Shape of cheekpiece?
It has the identical beaver tail cheekpiece to the Atchison rifle. The molding follows around the cheekpiece... over the comb... and terminates on the lock side.
Key escutcheons?
Silver or possibly German silver. It's interesting that none of the silver inlays are engraved except the cheekpiece inlay. But all the screw heads are engraved.
Shape of guard? Big round English shotgun guard scroll? Is the trigger bar extra long and guard screwed to it?
The trigger plate is a short conventional trigger plate. The double set triggers are single acting. The front trigger alone can not fire the rifle. The rear trigger must be set. The trigger guard is a separate part. It is not attached to the trigger plate like late period rifles. It is fastened directly to the stock with wood screws through the front and rear finials. The front portion from the front finial... through the bow... and around the scroll... is one piece. The rear finial is brass brazed to the top of the scroll.
Pictures?
The photos I posted are for personal study purposes only. Copyright applies. I'm not giving permission for them to be shared or published. Sorry.
Here is something else to consider about this rifle...
The barrel is 39" long
It is .50cal with 7 grooves.. NO we did not measure the twist. We had no way of doing so.
Barrel width measurements...
1.040" at the breech
1.014" at the rear barrel key
.984" at the front barrel key
.961 at the front of the entry pipe
.922 at the front of the middle ramrod pipe
.926 at the front of the front ramrod pipe
.933 at the muzzle
According to the museum record the rifle weighs 9lbs 9oz.
The typical late period... 1860's... post Sam Hawken retirement style rifle that we're used to seeing generally weighs around 11-12lbs.