Need help identifying Musket!

[BruderShweigen]

It is a very old, remarkably rust free smoothbore percussion lock, with british markings. On the action is a Crown with the letters V.R, and the words TOWER in a vertical fashion rearward of the hammer. The stock has been sporterised to about a foot of the end of the action a long time ago, probably by a certain "J.R. MARS" who also engraved his name on the stock. The cannon is very very long, i would say three feet. The calibre is around .75. The buttplate and trigger guards are brass. It does not have a rear sight, or any sign that there ever was one. The Sling swivel on the trigger is gone, and the stock tells me that there was place for a loading rod due to a circular mark in the wood. I beleive it is an Enfield, but can someone who knows better help me as to what it may be and how much it's worth?

 

[tiriaq]

If it is .75 caliber smoothbore, it may be a sported pattern 1839 musket. Its not an Enfield, if it is marked "Tower".

 

[Steppenwolf]

Can you post any pics?

SW

 

[BruderShweigen]

Unfortunately no, i can't post any picture. I forgot to say that there is some kind of brass arm connecting the three screws at the left side of the musket.

It's almost identical to this apart from the full stock, rear sight and the weird finger-groove-thing on the trigger guard.

Additionnal markings:
The stock has MOXHAM stamped in block letters underneath, and a sign like an upwards pointing arrow with BO underneath. On the stock after the trigger guards there are two sceptres.

On the cannon there are three marks: One Crown with GR underneath and a V under the GR, A Crown with VR under, and finally a crown with two crossed sabres.

 

[tiriaq]

Three screws on the side opposite the lock? Do all three go into the lock, or is one a woodscrew holding the sideplate? There should only be 2 screws into the lock.
BO /l\ is Board of Ordnance property mark. Sounds as if the barrel has marks for both George IV and Victoria. Moxham was a contractor, but I thought he worked earlier than this gun would have been made.
I think your gun is the remains of an 1839 musket, and suspect that the photo you posted is of a .702" rifle, which predated the .58 Enfield rifled musket. GrantR is a CGN who would know.