Except it has a percussion lock and looks to be in the correct proportions for the 53p Enfield, also from as much as can be seen in the image the bayonet socket looks correct for the 53p as well. Of the original all 53p I've seen (and there are quite a few as it was produced in such massive numbers in Birmingham and London) there's a fair amount of variation on some of the styling due to them being made under license by various comercial gun makers.
It does look like a nice example as it has bayonet. I'm very rerely allowed to but the bayonet on my repro in shows because of Health and Safety

(I'm shoving black powder down the damn thing and pointing it at people, **** H&S

)