Hanno;
Both photos of Priest Kangaroos are from the troops forming up for Operation
TOTALIZE, (7-10 Aug 44). 51st (H) Inf Div attacked on the left and 2nd Cdn Inf Div attacked on the right. (see attched map). The reason why there is photos of Priest Kangaroos with both chalked "69" and "HD 69", is because, this is the way that they were marked to: 1) so the infantryman using them would know which vehicles were assigned to their battalion and 2) because both 2nd Cdn Inf Div and 51st (H) Inf Div, where using battalions from their junior infantry brigades in the same attack (both the S.S.R. and 7th A&SH both had the same AoS markings, white 69 on a brown backing), the Kangaroos transporting the S.S.R. were chalked "69" to denote the S.S.R. of 6th Inf Bde, 2nd Cdn Inf Div and the ones transporting the 7th A&SH were chalked "HD 69" to denote the 7th Argyll's of 154th (H) Inf Bde, 51st (H) Inf Div., these markings also aided in movement control for them moving into the FUP. I've attached photos of the two Kangaroos in question, below the map, more or less in line with their access of advance in the attack. Hope this clears up your questions concerning "69" and "HD 69".
Cheers