help id hammer gun

[arkrunner]

URL=http://s142.photobucket.com/user/arkrunner/media/20150630_175136_zpspxhmxsxc.jpg.html][/URL]f
ound this hammer side lever in a friends closet
30 " barrels. With bore pitting and very loose
Any ideas on make an value
Has SHC on sidelock

[OH Osthaus]

how about some pics of the proof marks under the barrel

and the watertable(flat) of the action

[arkrunner]

Little more research comes up with Shapliegh Hardware farm gun.