Beautiful & unique... Finally getting this back from Turnbull Restorations...it's a Griffin & Howe custom single shot rifle built on the Sharps Borchardt falling block action
Caliber: 22-3000 R2 Lovell.
Griffin & Howe build number on barrel: 1853 (circa 1941)
Turnbull's fixed the wrist and fitted a "new old stock" Mershon No-Slip butt plate (that took me several months to find) in place of the original that had melted over time.
08-13-2018 finally found the "before" pic of what the stock looked like prior to being given to Turnbull Restorations.
(thanks to skeettx for the photo help!)