A bit off topic but as someone mentioned the pop out indicators...

My brothers first car was an Austin A40. Didn't have pop out indicators but it did have a clockwork indicator control on the dashboard! You turned it in the direction you wanted to indicate and it clicked down physically for a few seconds and then stopped. I dunno if that was fitted as standard or if it was a custom 'improvement' :-)

It also has the number plate 'SAK 20' which I reckon would be worth a fortune nowadays.