2017 AD., Germany, Federal Republic, 200th anniversary of the "dandy horse" invented by Karl Drais commemorative, Karlsruhe mint, 20 Euro.

Germany, Federal Republic, 200th Anniversary of the "dandy horse" by Karl Drais commemorative, engraver: Friedrich Brenner, Karlsruhe mint, 2017 AD.,
20 Euro (ø 32,5 mm / 18,06 g), 0.925 silver, 18,00 g theor. mint weight, mintage ?, axes medal alignment ↑↑, plain, incuse lettered edge,
Obv.: BUNDESREPUBLIK DEUTSCHLAND / G / 20 EURO / SILBER 925 / 2017 , issuer, date, mint mark, silver content and value around German coat of arms (eagle), 12 stars flanking in a half circle below.
Rev.: LAUFMASCHINE VON KARL DRAIS / 1817 , man riding left on a draisine (dandy horse) along a grassy path in historic clothing, carriage without horses (horse death) and a volcanic eruption (Tambora eruption in 1815) in background r.
Edge: plain with incuse inscription “200 JAHRE ZWEIRADPRINZIP • " (translated: "200 years bycicle system").
Ref. ? .

Year / Mint Mark / Mintage
2017 / G / ?
2017 / G / ? (proof)

Karl Drais (29 April 1785 – 10 December 1851) was a German inventor, who invented the Laufmaschine ("running machine"), also later called the velocipede, draisine (English) or draisienne (French), also nicknamed the dandy horse. This incorporated the two-wheeler principle that is basic to the bicycle and motorcycle and was the beginning of mechanized personal transport. Drais also invented the earliest typewriter with a keyboard in 1821, later developed into an early stenograph machine, a meat grinder, and a wood-saving cooker using a hay chest.

The dandy horse is a human-powered vehicle that, being the first means of transport to make use of the two-wheeler principle, is regarded as the forerunner of the bicycle. The dandy horse was invented by Baron Karl Drais in Mannheim, Germany, and patented in France in February 1818 (Badenian privilege in January 1818). It is also known as a Laufmaschine (Drais' own terminology, German for "running machine"), the official designation velocipede, or draisine (a term now used primarily for light auxiliary railcars regardless of their form of propulsion), and in its French form draisienne.

According to a theory developed by Hans-Erhard Lessing in 1996, the development of the dandy horse was influenced by famine, lack of feed (oats) and horse death after the Tambora eruption in 1815, one of the greatest natural catastrophes of history occurring in the northern hemisphere in the summer of 1816 by cold and continuous rain led to crop failures (year without summer) and grain prices rose.

More on https://en.wikipedia.org/wiki/Karl_Drais ; https://en.wikipedia.org/wiki/Dandy_horse