Interior of casemate seen 4 pictures earlier.

interiorofcasemateseen4picturesearlier.jpg

To the left is the 47mm Skoda built anti tank gun. To the right is the coaxially mounted Mg 37 machine gun.

http://en.wikipedia.org/wiki/47_mm_kanon_P.U.V._vz._36_(%C5%A0koda_A6)

http://en.wikipedia.org/wiki/ZB-53