The F31 on its announcement.
 

The Dutch Barron Racing Team announced the creation of the "first professional Dutch F3 car" in 1984, a claim that DAF might have had a quarrel with. Prior to the development of their own car they had been running March and Ralt chassis in the European Championship since 1980. They also ran a couple of ex-works Tyrrell 012s in F5000 in 1985 notably for Roberto Moreno without much success and then part way through the year the team disappeared.
 
  
The unusual lines of the F31 are clear in this overhead shot.

The digital tacho and warning lights feature in the narrow cockpit.

The F31's footbox and front suspension detail.
Built in late 1984, the F31 certainly looked the part with its flat rear deck and abbreviated sidepods. Designed by Kees van der Grint, who had previously designed the McGregor FF1600 and 2000 cars, the monocoque employed a bonded and riveted sandwich construction to reinforce the aluminium tub. Suspension was narrow track with pushrods at the front and rocking levers at the rear, custom Koni dampers were fitted all-round. Stopping was courtesy of AP/Lockheed single caliper outboard brakes front and rear. Power was provided by a Toyota engine and a Hewland Mk9 gearbox were fitted.
Unusually for the time a digital tachometer was fitted with the other gauges; oil temperature and pressure, fuel pressure and water temperature, replaced with a series of warning lights. "Green" meaning OK, "amber" call in at the pits and "red" switch the engine off immediately!
Due to compete in 1985 it seems that the car never actually raced, at least in the UK or Germany. In June of that year it was reported that Dutch FF2000 champion Lammy van der Heuvel would be testing the car but presumably the demise of the F3000 team saw the end of any F3 aspirations also.