This is a photograph of my Uncle Len’s Troop. A note on the back says it was taken in Ferndhorf, Austria in August 1945. I have a copy of his Service record which shows he was with the 64th Ant-Tank Regiment during this period. I would be grateful if someone could explain the sign on top of the gun. I presume this is “F” Troop but what is the number 46? Is this the Battery number? I intend to go through the war diaries in more detail but a quick look last night showed no reference to Battery number 46 with the 64th A/T Regt. Also, I know this is probably a stupid question but is that a tank or a Self-Propelled gun behind and what is the difference between the two.