Idly reading up on the early model cruiser tanks on Tanks Encyclopaedia and came across this image: As well as showing two very different styles of gun mantlet, it also appears to show three different styles of radiator. The front tank has the four raised panels commonly seen in photos and on the example at Bovington, while the third tank appears to have a completely flush plate, and the second tank somewhere between the two extremes. Could these panels be removed, or raised and lowered in the field? Every other photo I've seen of a Covenanter has the prominent raised panels seen on the front tank, so it struck me as rather unusual.
The third tank appears to be a Covenanter II. In its service career the tank underwent no fewer than 8 mods to the cooling system. See this link - the first three tanks have the flat plate and the ones behind appear to have the design shown in the 2nd tank https://3.bp.blogspot.com/-2tXRu64w...q2iItw76n8EnPxKC3vXtWQ/s1600/covenanter-7.jpg
Not certain on this but I think the 1st tank in the OP is a Covenanter IV, the 2nd a Covenanter III and the third a Covenanter II. There were also sub variants with asterisks. They never got it right
Aha, I see, thanks! I knew they'd had endless trouble with the radiators but for some reason I'd always assumed the various modifications were purely internal.
