Start of the Tour de France in the Netherlands for the sixth time.
In 1973, Scheveningen was the starting point for the Tour.
Leiden (no stamp known) was next in 1978, and in 1996 it was 's-Hertogenbosch.
2010 The Grand Departure in Rotterdam.

I would also like to take you on a cycling-theatrical journey to the origins and history of the Tour de France; watch and read along...
A bicycle-atelistic view of the Tour de France

As a result, in 1903, Henri Desgrange and his collaborators developed a plan to instantly bind sports readers to “L'Auto” by holding a Tour de France for cyclists—a huge adventure for those days. The Tour de France proved to be a great success, and the circulation of “L'Auto” (later L'Équipe) rose from 20.000 to 130.000, of which 65.000 were subscribers. With this, the first Tour de France already proved its commercial value. In the pioneering days of the Tour, the longest stages were ridden, some even exceeding 450 km. The first Tour de France in 1903 consisted of six stages covering a total distance of 2428 kilometers.



In 1972, the Republic of Equatorial Guinea issued a commemorative "sheet" on the occasion of the 59th Tour de France for, among others, the multiple Tour winner Eddy Merckx, who also won the Tour de France that year (for the fourth time).
A year later, in 1973, the 70th anniversary of the Tour was celebrated with the organization of the sixtieth race. The Spaniard Louis Ocana became the winner.


Leo Duijndam, winner of the 205 km long 8th stage of the 59th Tour of 1972.
Postmarks
are also a welcome feature in the bicycle sphere. For instance, many stage stamps have been produced. Even if the postal item does not have a bicycle stamp, it still belongs within the BICYCLE theme.
Postmark July 9, 1987 stage to Renazé
8. Beautiful postmarks from the 5th stage on July 2, 1985
Postmark July 10, 1987 relocation to Futuroscope.
The yellow jersey
The sports magazine L'Auto (later L'Equipe) was printed on yellow paper. That yellow paper became the reason for adorning the race leader with the yellow jersey.

















Nice to hear from you again, Jan.
Thanks for your email, Willem. Current events, eh! I trained 126 km today for the Utrecht touring version on June 28th. Moreover, I have a PowerPoint presentation about the 6th Grand Depart in the Netherlands, cf. the example shown here.
nice design