This two pictures seem to show a Centurion with SVN modifications but no .50 ranging gun. The second seems to be Mk5 without the up-armored glacis...even though the track guards look like the way they modified them in SE Asia, perhaps the 2nd picture is not a SVN tank?
A Centurion Mk V/1 tank, (ARN 169017), from C Squadron, 1st Armoured Regiment, which was commanded by 37709 Sergeant (Sgt) Stan Hanuszewicz (nick named ham sandwich).
Definitely still carrying the Mk3 turret with angled loaders hatch...
So I guess what I am getting it is, there seems to be no real combination that is "wrong" when it comes to these tanks...or is there???