Best Martini Henry

[bigduke6]

Big Duke, what is the markings under the crown crown?

TheDoubleD,
Markings under crown are E.R Underneath this R. E. Co then date 1901.
The butt has "c/s furst " impressed using dots to form the letters, also has the original sight protector.

Planning on deactivating it so can go on display, am just trying to find any info on Colour sergeant Furton before deactivation.
Dont know how true it is but have read that these were still issued during WW1 to the Royal Artillary and Royal Engineers.