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This is a early 20th century pocket watch from Robert Cart, inventor of the Heures Sautantes jump hour watch. I am hoping to find more information as to what the production numbers were of watches with his own name. I own a WG piece as well, both have higher end, well finished movements. Surely his

I have a collectin of various Cart jump and wandering hour pocket watches. I also now own 2 Robert Cart pocket watches, both rather high end, probably 1920-40 era, one in WG and the other platinum. Is there any record of how many watches were produced with his name?

I've been wanting to find machines to make a small pinion. Having seen the process I will find a plan B, probably more than I am capable of handling. Excellent report

Any other info on the rectangular case anniversary edition? What did they sell for?

Very nice tonneau GP, perpetual calender in SS. Very nice to wear on the wrist with sloping lugs. Existing band does show wear, have new GP signed strap that will accompany watch. Can offer complete service if desired, cleaning and lubrication, though no existing problems or concerns