Original British Martini-Henry Rifle Cocking Indicator Locking Screw ERA a square central hole that

a square central hole that allows the tool to be used as a wrench for turning the cleaning/charging rod while cleaning the bore or drawing a charge

original markings

making it legal to own in the USA

but not guaranteed

and soldiers often personalised them by adding their names

Original British Martini-Henry Rifle Cocking Indicator Locking Screw ERA a square central hole thatOriginal Item: Cocking Indicator Locking Screw compatible with most variations of the British manufactured Martini Henry rifle. This is the screw that holds the cocking indicator, which locks the components inside the receiver in place. Offered in very good condition.