Just got back from the Collector's Gun Show in Fond Du Lac. Picked another No 1, Mk III, this one from 1909 with all numbers matching:
https://www.milsurps.com/vbpgimage.p...7&d=1744478298
The stock cannot be original as the slot for the magazine cutoff is mostly covered-up. Some of the wood, such as the Butt stock and the upper hand guards may be original. Other than that, all numbers match, including that on the rear sight.
Some more pictures:
https://www.milsurps.com/vbpgimage.p...8&d=1744478352
https://www.milsurps.com/vbpgimage.p...9&d=1744478385
https://www.milsurps.com/vbpgimage.p...0&d=1744478414
https://www.milsurps.com/vbpgimage.p...1&d=1744478460