Marlin- Ballard custom single-shot, Schoyen bbl, set triggers

Ballard single-shot, antique
31.5" bull barrel
measures 1.150" at muzzle
1.230" at breech
Geo. C. Schoyen Denver, CO bbl
Bore diameter is .370-379 "at muzzle
Has extractor for rimmed cartridge
Cartridge approx .420" at base, rim is approx .520"
Unknown caliber
Bbl drilled and tapped for scope and front sight
Scope mount holes- roughly 8 5/8" on center
Receiver drilled & tapped for tang sight
Receiver is marked "Marline Firearms Co. New Haven Conn"
Adjustable set trigger
Walnut sporter type forearm
Walnut monte carlo stock
3/4" extention, LOP is 14" (trigger to center of buttpad)
Receiver and lever show some case color
Bbl is blued but mostly turning brown

*Rifle is heavy- will ship in plastic case*