Charming 19th Century calendar and thermometer in the shape of a miniature violin on a hinged stand, in leather and brass and other materials, with temperature markings running up the neck while the day, date, and month - visible through windows in the body - are printed on rollers that are manually rotated using brass knobs that extend out through the sides of the violin.  Provenance unknown, but assumed to be Continental. Cracks in leather, no thermometer present, else fine.  Approx. 5w x 9h x 1d inches (12.7w x 22.9h x 2.5d cm.).