Nice rifle Cordite - I was an uncultured person who thought them ugly until I had one, a carbine in .450 1 1/2" posted here
http://forums.nitroexpress.com/showflat.php?Cat=0&Number=266856&an=0&page=2#Post266856

acquired the taste and bought a 1871 Dangerous Game rifle in .577/500 as by then I liked them!
!http://forums.nitroexpress.com/showflat.php?Cat=0&Number=279536&an=0&page=1#Post279536

The .450 No. 2 Musket is an excellent cartridge and good to reload

Yours looks like it was destined for the South African market with the multitude of sights, also with the cleaning rod for remote places
Is yours (rod) steel or wood and does it have the extension hidden in the butt?

Huvius who posts here has more than one and is well up on them and may post more info

TH44