Richard,
It's not one of the 666 that went to England, therefore if it's English marked it's not a .44 1st Model .455. Chances are it's a .455 1st Model. Therefore it would have to have been shipped between 1914-15.

However, it's conceivable that it COULD EVEN BE .44 1st Model .455 but one of the 691 later batch (though we do know the numbers reported so far are in the 12000-14000 range) with a duplicated number from the .455 1st Models. The 691 weren't all shipped until Oct. 1916 per the History of S&W. There's no way to tell and it just makes my head spin.

I would surely letter it but as I asked Lee in post #32, I can't figure out how Roy would know!

__________________
Jim
S&WCA #819