I used to have to use a old fashioned phone receiver ( like the ones on old rota dial phones) in my Sierra and Capri traffic cars and Sherpa TRG vans back in 90s... proper police cars in GMP then
Had a Mexican Beetle 1600 twin carb back in 1980 and a girlfriend like this too.
She managed to roll the Beetle teaching her to drive in the Dessert in Saudi Arabia which was a big no no then.
Young and Stupid
How wierd, that number plate was on my car when I bought it. It was a Ferrari F430 and the previous owner took it off about a week later (by agreement when I bought the car).