New and First Krag

I recently purchased my first Krag. Cartouche is 1903 and I believe it to be correct for the serial number of the rifle. Anyone know what the markings are on the stock left side?
https://www.milsurps.com/images/impo...e18f7285-1.jpg
https://www.milsurps.com/images/impo...41441d11-1.jpg
https://www.milsurps.com/images/impo...dc7d0013-1.jpg
https://www.milsurps.com/images/impo...6a7f36f0-1.jpg
https://www.milsurps.com/images/impo...a9577f53-1.jpg
https://www.milsurps.com/images/impo...3d604b5e-1.jpg
https://www.milsurps.com/images/impo...b08ca5ed-1.jpg
https://www.milsurps.com/images/impo...ba833eaf-1.jpg
https://www.milsurps.com/images/impo...9592f735-1.jpg
https://www.milsurps.com/images/impo...1bb5c3ac-1.jpg
https://www.milsurps.com/images/impo...e633b3c2-1.jpg
https://www.milsurps.com/images/impo...fa3beb32-1.jpg

What a nice rifle. Wish I could find one of those around here...you guys have them all... I believe that's a unit marking on the stock.

Welcome. Nice find. No hit in SRS listings. John