London Bus And Family..

A mail coach and a 1920 postbus are featured on the 1954 Stamp Day issue of the French-occupied Saarland stamp (Michel #349).

The 3.50 kr. high value (Facit #917) of Norway's March 24, 1983 "Travel in the Nordic Countries" set of two stamps contains a tour bus among the spring trees.

A postal bus appears on this June 9, 1931 cancel of Bremen, Germany.

Message says, "Club trips with the Reichspost."

Jersey
Jersey Transportation III
January 11, 2011
The stamp set depicts Paragon C10 (1926), Chevrolet (1935), Lioness C14 (1938), Lion (1939), Morris CVF (1948), AEC Regal (1961).

Democratic People's Republic of Korea (DPRK) (North Korea)
20th February 1992
Transport

Republic of Korea (RoK) (South Korea)
25th May 1983
Korean-made Vehicles
Asia Motors Co. Bus

designed - Chun Hee Han

Switzerland's postal buses ("Post Auto", for them), with a very characteristic horn music, is one of the most typical Swiss features when driving on that country's roads.

Here is a 1934 German cancel advertising the 'kraftpost". Cancel reads, "use the kraftpost...secure, fast, easy". The kraftpost would later be called "postbus".

From wikipedia, "A postbus is a public bus service that is operated as a part of local mail delivery as a means of providing public transport in rural areas with low levels of patronage where a normal bus service would be uneconomical or inefficient."

Here is a cancel from Germany, used 1927-29, showing a Post Bus with the inscription 'In the Post Cars of Saxon Switzerland'.
Info thanks to Postmaster GS some time ago.

Regards
DavidR

Austrian (born in Romania) graphic artist Ludwig Hesshaimer designed a series of transportation-themed labels for the WIPA '33 stamp exhibition in Vienna. One of these labels features a postkraftwagen/post bus very much like the one depicted on DavidR's postmark shown in the posting above.

On July 3, 1959 Egypt (UAR) issued a set of six, 10 millieme, bicolor, photogravure-printed stamps to commemorate the 7th anniversary of the Revolution of July 23, 1952. All of the stamps are inscribed "Transportation & Communication". One of them (Sc #468) depicts a bus on a highway.

Hungary - 1955:

This 5 centime stamp (Sc #370) of Switzerland was issued on March 9, 1959 to publicize the July '59 opening of the Swiss Museum of Transport in Lucerne.

The stamp shows a postbus with a chassis that extends far beyond the vehicle's rear axle. It has the look of postbuses manufactured by Adolph Saurer AG of Abron, Switzerland. This company was in production from 1903 -1982. The stamp may show a prototype which was never put into production.

Here is the 50 ore value (Facit #613) from Norway's March 24, 1969 Communications set of two stamps. Stamp depicts methods of modern mass transportation, including a bus.

Between 1930 and '35, this German cancellation bearing a postbus image was used by four post offices: Elbing 1 (city center), Elbing 2 (main train station), Marienburg 1 (city center), and Marienburg 2 (main train station).

The cancel says, "Postbus to Danzig, visa not required, 3 trips daily." The postbus offered cheap transport for vacationers who wanted to visit the casino or beach at Zoppot.