AT-gun

The Picture shows a Pak 35/36 Panzerabwehrkanone - The 3.7 cm PaK 35/36 was the standard infantry anti-tank gun of the Wehrmacht. It had been the most successful anti-tank weapon of the Spanish Civil War, an event which led the Wehrmacht to believe that the gun would be adequate for some time. Unfortunately for the Wehrmacht, the PaK 35 could not penetrate the French and British infantry tanks it encountered in France in 1940.

The 88mm sorted that out though. Great bit of information mate.

And as you can see, Finnish Army still used those in 1944 !