300 jaar off-topic, maar dat kan mij niet schelen. Dank Lolke!
Van
http://en.wikipedia.org/wiki/Erhard_Etzlaub:
Quote
The instrument maker
"Kompast" [sic!] was the term used for pocket-size sundials produced in Nuremberg since Regiomontanus' days, which were fitted with a compass, too, and were also used by seafarers. Only two of Etzlaub's pieces remain: one, from 1511, is kept by Germanisches Nationalmuseum (Nuremberg), another one, from 1513 and in Drecker's collection, purportedly "went to the USA".
In his time, Etzlaub's pieces were demanded: In a 1507 letter, Michel Beheim, brother of famous globe maker Martin Behaim, tells his brother Wolfgang that such pieces (i.e. more than one) will be sent to him to Lisbon within a few weeks, as soon as Etzlaub would have finished them. Johannes Cochlaeus notes on Etzlaub's work in Brevis Germaniae Descriptio, 1512, that his sundials were even demanded in Rome.
Groet,
fons