A white 51 on a red rectangle (it’s not
quite square: 8.5 inches or 21.5 cm wide and 9.5 inches or 24 cm high) on the right front and right rear is the arm-of-service (AoS) marking, and indicates the senior regiment in the brigade, without saying which regiment that actually is. You would need to know the regiment you’re dealing with to be able to look up the division emblem to go with it — or alternatively, if you have the division emblem then you can look up the regiment from the number. Both depend on time and place, though.
A name is probably unlikely on the rear of the turret, those generally appeared on the hull sides.
Also:
please don’t use a modern typeface like Helvetica, or even worse, Arial, for vehicle markings
