Guys --the following are primary measurements and comments regarding this rifle: The rifle is 59 & 1/4" OA
BARREL: 43 & 1/2" OA Breech is 15/16", waist is 13/16" muzzle is 14/16"; brass blade set in brass dove-tailed front sight set 3&1/2" back from muzzle OC. REAR SIGHT is 2&3/4" long with a screw to adjust vertical and, yes, it is installed in reverse of normal. BARREL KEYS: three, dome-topped, enter from right side. Forend Cap - 1&1/8" long with metal end cap.
TANG - 2" long with single screw, the end terminates in a low-domed soft-pointed finial. CALIBER: .54 smooth bore
PLEASE NOTE - for many years it was assumed that this barrel had been reamed out, but now I believe this is the original caliber - careful inspection a few years back shows a perfect circle engraved around the muzzle but set far enough out that it allowed "dash" engraving all the way around between the solid circle and the bore. Also, each corner of the where the flats join has A small circular punch-dot stamped - same as elsewhere on the mountings
TRIGGER: a single trigger which would seem to go with the smooth-bore design.
STOCK: full, curly maple. LOP is 12&3/4". Fore-stock with two incised lines terminating at bottom with wavy line as seen in photo.
BUTT-PLATE HEEL - 15/16" at point extends 2&5/8" forward on comb, HEEL is 4&5/8" tall, BUTT-PLATE is 1&1/2" max width.
WRIST - end of tang to comb is 4", COMB is 10&1/2" prox, 1&58" wide flat to flat in lock/lock-bolt area, wrist is 1&1/2" tall X 1&1/4" wide. There is NO crack in the wrist.
NOTE: the butt-plate and toe-plate (3&1/2" X 3/4") are ORIGINAL. It appears to have perhaps been dropped on the bottom corner, thus accounting for the small bend and visible space. There is a small crack (3/8") in lower corner and partial crack running from lower butt-plate screw to forward toe-plate screw. No wood has been replaced but likely glued in period. There are a couple of forend slivers which have been replaced.
CARVING and BONE INLAYS: as seen in photos.
LOCK: it is without question ORIGINAL (5&1/4" LONG) with a vg reconversion. It is retained by two lock-bolt screws with iron washers. NOTE - the original hammer-screw was retained as the heads of all three bolts/screw are identical inc engraving.
ALL IRON HARDWARE and ALL ORIGINAL: TG - 8&1/4" long with medium ridge held by two screws. Forward finial ( 1&58" long) flares with top filed flat which is engraved. Bow is 5/8" wide tapering on both ends down to 1/4" where it meets the bar. The rear finial is narrow also with medium ridge and the finger curl is only 1/4" wide/thick
RAM-ROD PIPES: TWO forward both faceted. ENTRY THIMBLE: 3" OA with forward faceted with lip and then extending straight back with filed flat facing.
ENGRAVING: This is what ties it together !! the Lock (as can bee seen), the TG forward finial, the Entry Pipe, the bow of TG (part of which can be seen), the Toe-Plate, and the top of Butt-Plate ALL have perimeter "Dash" engraved borders and some punch-dots, AND ALL have very well done similar/matching scroll with some incorporated geometric engraving (light/shallow but done this way) ALL of which is VISIBLE but never photographed.
Hope this helps,
Arnie