Sieb Postma

1954 Inter - Inter

2 race(s)

Series Race Date Event Track Bike Entrant Result
1954
Inter 250cc May 16 Circuit van Zandvoort Zandvoort 250 Moto-Guzzi 9th
Inter 250cc Aug 7 Internationale Motorraces Tubbergen Tubbergen 250 Moto-Guzzi 2nd