Ah, ole Napp is probably some obscure firearms merchant there but I don't think it is Pilsen(Plisen???). Maybe put some soap or chalk on it and it may reveal itself. Axel may have info on Napp and know the city. It experienced proof in October of 1910 at the Zella-Mehlis proof facility. And I'd say the Barthelmes boys played some part and the tubemaker's mark may be that of Emil, or Engelhardt, Barthelmes of Zella Sankt Blasii who hung out his shingle in 1854. Of course his sons or M. Metzner had entered the scene by 1910. M. Metzner may have been into tubes also. But I'd attribute the tube knitter's initials of RS to Robert Schlegelmilch of Meiningen(an der Ower??). Like to see some close-up images of the marks just forward of the flats maybe with a little soap or chalk. Right tube looks really tight. Also see if you can get the DRGM number off the top strap and we might be able to connect it to a Z-M maker.
Kind Regards,
Raimey
rse
