It appears this is a Portuguese contract Snider. Note the Crown is consistent with this contract. There does not appear to be any British Military Acceptance , though inspectors marks are in several places. The Bore is very good, no major pitting and is sharp and shiny.
Full length image
Lock-plate Markings
Breech Markings, Note B.S.A.Co.
Insepctors and proof marks
Open Breechblock Serial No. 238
Bayonet lug appears to have been replaced, possible incorredct cleaning rod