Switzerland - Alpine Postal Motor Coaches route map and guide - Summer 1937.
The Swiss Postal Motor Coach Tours, run by the Swiss PTT, had high standards of publicity for many years in the mid-twentieth century as can be seen in this series of annual map guide brochures from the 1930s. They show the distinctive yellow/cream touring coaches (usually built by Saurer) in abstract landscapes. I didn't know the artist "R" but thanks to DL (below) it has been confirmed as Bernard Reber. This is the 1937 offering.
Switzerland - Alpine Postal Motor Coaches route map and guide - Summer 1937.
The Swiss Postal Motor Coach Tours, run by the Swiss PTT, had high standards of publicity for many years in the mid-twentieth century as can be seen in this series of annual map guide brochures from the 1930s. They show the distinctive yellow/cream touring coaches (usually built by Saurer) in abstract landscapes. I didn't know the artist "R" but thanks to DL (below) it has been confirmed as Bernard Reber. This is the 1937 offering.