David Brown 'VAK 1' agricultural tractor on pneumatic tyres, by David Brown, Meltham, Huddersfield, Yorkshire, Serial No. 1750, 1940. Engine: Serial No. 18774-cylinder 25 hp overhead valve petrol/tractor vaporising oil. Fitted with power take-off and three point hydraulic linkage. The first model of tractor produced by David Brown after their break with Harry Ferguson. David Brown 'VAK 1' agricultural tractor on pneumatic tyres 1940