I am posting this for a friend. He has inherited from his grand father a few weapons and he is not going to keep any of them. I have purchased a couple and offered to try and find a fair value and possibly a buyer for one. It is an 1887 VR Enfield Mark IV Martini rifle. From what we can tell on the internet it is an early Mark I converted to a Mark Iv at the factory. It has a barleycom on a block front sight. It looks to be all there and functionable but very old and dirty. I am still trying to find out the caliber but I believe it is a .450. Any help would be greatly appreciated.