" 6.5 x 55 " 

Ammo Can Label.  

The 6.5x55 cartridge was initially designed during a joint Norwegian-Swedish commission. Norway officially adopted the 6.5x55 in 1894. Unfortunately, history seems to have forgotten Norwegian involvement even though over a quarter of a million rifles were produced in Norway. To the dismay of modern Norwegian hunters and historians the 6.5x55 is today frequently known as the 6.5x55 Swedish Mauser.