MDC Max D├Ątwyler AG.

Switzerland.
Max D├Ątwyler & Co, based at Bleinbach-Leupenthal, produced in 1960 a glider-tug based on the Piper Super Cub, designated MDC-Trailer. Produced subsequently a modernised version of the Bucher Bu 131 Jungmann, known as the Lerche. First flew in 1983 the prototype MD-3 Swiss Trainer.