On Christmas morning, here in Australia, I happened across the replay telecast of the Alinta Christmas Pageant just in time to see Perth’s Batmobile (1966), with Batman and the Penguin waving to the crowd.
I can’t work out if Penguin is driving or it is a deliberate right-hand drive vehicle (because its owner lives in Australia). The commentators mentioned that the Perth-based local Batman only makes one public appearance each year and it is for this Christmas pageant. Total fluke that I had my iPhone in my hand when the footage appeared,
As Penguin has both arms raised (which would be very reckless, even for him), and knowing how particular Batman is regarding the Batmobile, I’m guessing it’s a RHD.