Ralph Heintz kindly loaned me a rocking chair movement which
I photographed for the MMD Pictures site. The 12-note movement
includes an air-vane governor and a spring motor, the base is
6 cm square, the height (less pushrod) is about 6 cm.
The spring motor is fitted onto the cylinder axle, opposite the
end with the governor. The motor is wound by a pair of pawls,
moved by a pushrod linkage, that engage ratchet teeth on the
periphery of the motor case. The tip of the pushrod is of Nylon
or Delrin, so it seems the device was produced in recent decades.
The mechanical design is quite nice but I fear the pot metal ratchet
teeth might be prone to failure. Cast into the base is "Made in
Switzerland" but the name "Reuge" appears only on a paper sticker;
I don't know who actually built the movement. See the photos at
the MMD Pictures site, http://mmd.foxtail.com/Pictures/