A Brief History of the Marque
Manufactured 1955-1964 by N.V. Dokkum using JLO and Rotax engines
Their first product was a small car powered by a pair of TWN (Triumph Germany) engines, hence the name BiTri. It was not a success, and the partners turned to scooter production. Their factory in Dokkum built most of the components in their workshops and produced several thousand scooters. They were the only Dutch scooter manufacturer.
Considerably more information here: Bitri Scooters Archive
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