75mm gun of Staghound III?

Was the gun used in the armoured car Staghound III the British OQF 75mm or one of the american 75mm guns?

 

It's a Crusader III turret with the Ordanance QF75mm gun.

 

Picture :

 

Thanks for your replies. It makes sense that it was the British gun.

 

Was it a low pressure gun? Seems to me that the vehicle would flip if fired with the turret traversed over the sides.

 

I think it was comparable to the US 75mm M3.

 

i may seem stupid
but a 75mm gun on a armoured car is a bit overkill

 

Even so, it looks pretty cool!

The official British clasification for armoured cars were originally "Tank, Light (Wheeled)", which makes sense when you look at some of them.

 

it does doesnt it