Nice looking H.E....
I have a New Century " triple lock" from 1914 that was also converted from .455 to 45ar that is similarly marked..
(I haven't fired mine as of yet, the previous owner did. However I just read awhile back on another fourm, about one having the cylinder crack using modren .45auto amunition,, it may have been a once in a life time thing, but I'm going to "cook up" some lite-loads just for plinking.. These guns are quickly reaching the 100 year old mark.. and parts are becoming hard to come by..)
Now that the horror story is over,,,, they are wonderfull guns, love the action and craftsmanship , Not to mention for their age, and where they were sent , and at what time frame in history , it's a good possabilty that they are some of the few that have actually " been there & done that"