SOLD - Important Museum Quality Harwood Automatic vintage 1920s - First Automatic Ever Produced
Here is some more information from the Harwood site:
On the Isle of Man, the English watchmaker John Harwood had a vision of a new type of reliable wristwatch that would eliminate the shortcomings of watches available at the time. Dust and moisture were the most common culprits he encountered in his watch movement repairs. John Harwood therefore set about developing different winding and hand-setting mechanisms located inside the watch to dispense with the need for an opening in the watch case for the winding stem.
Coincidence that gave John Harwood the brilliant idea for his revolutionary invention. Observing children playing on a see-saw, he began to envisage the basic design of his legendary “self-winding mechanism”. Using accumulated kinetic energy to tension the spring of a wristwatch was an excellent idea. A series of experiments culminated in the first prototype of a self-winding wristwatch that was created from a discarded pocket watch.There was no winding crown and the hands were set by rotating a milled bezel, which was also used to wind the mechanism. A red dot, which appeared in the dial aperture above the “6” showed that the mechanism was running.
John Harwood traveled to Switzerland several times since he felt that only there could he find the technical conditions for realizing his invention. On September 1, 1924 the Swiss Confederation in Berne awarded him Patent No. 10 65 83 for his pioneering invention of the first self-winding wristwatch.
The HARWOOD Automatic relied on pawls and clockwork and a pivoted oscillating weight that moved to and from through an arc of 270° hitting buffer springs on both sides (so-called hammer automatic).