I find this box interesting and thought I would share. There are many examples of boxes and labels like this, but they don’t appear very often. Western Cartridge Company introduced Lubaloy (Lubricating Alloy) in 1922. Unlike the “standard” gilding metal alloy used for bullet jackets, (approx. 90% copper and 10% zinc), Lubaloy consisted of 90% copper, 8% zinc and 2% tin. I assume that the strategic material eliminated from the alloy in the bullet jackets in these cartridges was the tin. Outwardly, they appear as any other GM bullet. The code on the inside of one of the flaps indicates box filling on January 25, 1945.