CYLINDER

SN Blocks of solid concrete, in the form of cylinders usually 2 feet across x 2 feet 6 inches or 3 feet high. Cylinders were mainly used in road blocks intended to impede enemy movement in the event of invasion.
CL MILITARY DEFENCE AND FORTIFICATION
BT ANTI TANK BLOCK

 
 

CYLINDER

SN Blocks of solid concrete, in the form of cylinders usually 2 feet across x 2 feet 6 inches or 3 feet high. Cylinders were mainly used in road blocks intended to impede enemy movement in the event of invasion.
CL MILITARY DEFENCE AND FORTIFICATION
BT ANTI TANK BLOCK