1905/First Change, No. 102653. Haven't dated it yet, but I'm guessing 1907.
Love the 6.5 inch barrel; that extra half inch just makes the gun twice as elegant. The last patent date is 1901, and the cartridge stamp recognizes both the .38 S&W Special and U.S. Service (AKA .38 Long Colt) cartridges.
The photos make it look a little better than it is; there are microscratches and freckles, and blue is missing from the backstrap and top of the barrel where the address and patent dates are. Maybe 90% blue remaining? No rust, though, and bore/chambers look new. Action is excellent. Stocks are seemingly unnumbered, but look to be original (proper design and excellent fit).