Excellent pics Graugrun.
The original Olifant had the same Horstmann suspension as the Centurion, to my knowledge.
The easy, quick giveaway that the suspension had been changed from the Mk1b onwards is to look at the 6 roadwheels in each side. They are grouped in 3 clusters of 2 wheels each.
There is a gap after the front first cluster of 2 wheels.
This is present in the Centurion and Olifant MK1.
As Graugruns pics show, the suspension was completely renewed and changed from the Olifant Mk1b. This includes the Mk1b, Optimal, and MK2.
A torsion bar suspension with hydraulic dampeners and double floor.
You can see that the "clusters" and the gap after the first pair of wheels is no longer there, being far more evenly spaced.
From the Mk1b onwards, the Centurion was basically stripped to the bare hull and turret and completely rebuilt and redesigned.
