A.K.A. New Century, Triple Lock, .44 Military - Model of 1908.
I had one that belonged to my father. 6 1/2" nickel, MOP stocks, serial number 3463. Shipped February 1912.
Sold it at a gun show and regretted it.
Was able to replace it here on the Forum. Found one that was 6 1/2" nickel, MOP stocks, serial number 12090. Shipped April 14, 1916 to the Cowdrey Company, New York City. Actually in a little better condition than the one I sold.
Letter said checkered diamond square butt grips with gold Smith & Wesson medallions. Picked up a set of those. Sold the MOPs to offset the cost a bit.
I liked that the old gun had a four digit number and shipped four years earlier, but happy I was able to more or less replace it.