Dennis and Peter Adams, who used to work at a British sports car manufacturer called Marcos, decided to create futuristic cars that explore extreme styling. The result of their efforts ended up being featured in Kubrick’s “A Clockwork Orange.”

The M-505 Probe 16 stood at just 34 inches tall and didn’t have conventional doors. Instead, it featured a sliding glass roof that necessitated passengers to hop in and slide down into reclined bucket-style seats.

Although the interior resembled a jet fighter cockpit, it was powered by a 1.8-liter OHV, 1,900cc JanSpeed-tuned 4-cylinder Austin B-series engine from British Motor Corporation (BMC), positioned transversely behind the driver. It was paired with a 4-speed manual gearbox, along with four-wheel independent suspension and disc brakes.

The Probe 16 made its debut at the 1969 London Motor Show, where it received the “Best Styling Exercise” award. While three were produced, only two are currently known to exist (chassis no. AB/2 and AB/3). Initially, it was believed that the prototype was destroyed in a fire, a known issue with mid-engine cars from that era, leaving behind chassis AB/3 and AB/4.

However, according to Bonhams (who auctioned off AB/3 in 2020 for $184,800), the prototype, which was sold to songwriter Jimmy Webb, is still in existence, while AB/4 is not. Regardless, it’s without a doubt a concept car that should have been produced.