The German Museum of Mechanical Musical Instruments at Bruchsa

The Badisches Landmuseum at Karlsruhe has an excellent website where you can listen to some exceptionally rare and fascinating mechanical musical instruments and musical clocks.

Here you can listen to a Musical cabinet by the Veith-Langenbucher company, Augsburg, circa 1620... or an Elephant Clock, c. 1760, Clock case: Antoine Foullet, Mechanism: Tibeauville-Lamy... or an Apollo Clock, c. 1780... or a Chest with Flute Mechanism, c. 1804, Davrainville workshop, Paris.

The website has this to say about the Musical Chest:

After Napoleon was crowned Emperor he is said to have commissioned this model and given it to the Duchess of Bordeaux. The metal pin roller, also known asa cob, has eight melodies by Joseph Haydn which he specifically composed for this mechanical instrument.

I wish there were better pictures available to post, but the sound files are definitely worth checking out!