Prince Azamah had a convertible Bentley which later went to his son Prince Mukkaramjah, the present Nizam. Interestingly Prince Mukkaramjah had a sheet of steel attached to the underside so he needn't brake for stones!!!
He related an episode once to Dad when enroute to Ooty he managed to smash through rocks on the road, but apparently the tyres were bald by the time they reached Ooty. Later this car went to his home in Australia and possibly ended up rotting there. His residence was Havelock House in Perth, anyone seen a Bentley in the compound? Lets try to fish out pictures of this car if possible.
BTW a bit off topic but of interest. Prince Mukkaramjah spent more time working out and using his innumerous earth moving equipment than playing out the typical princely life. He was known for his physical strength and once when a Jeep had a flat tyre and there was no jack in sight he simply lifted the car and held it while they changed the wheel (not sure which end

) When I heard this story from the son of his PA I didn;t doubt it one bit as I distinctly remember noticing his large wrist while shaking his hand once.
He remains in my opinion the most impressive of the royals this side of Bhupinder Singh of Patiala. Extraordinarily cultured, refined in manners and most charming. We (my family) remain his loyal subjects

(you can tell can't you)