Zenith Cal 143-6 Chronograph ZENITH CHRONOGRAPH, Excelsior Park 4 movement. The stainless steel case measures 37.0mm excluding the crown and 44.4mm tall. The watch runs, keeps time and the chronograph functions are working properly. The top pusher clicks when starting and stopping. The bottom pusher sharply resets to zero, but does not click when pushed. I'm not sure if this is normal. The service history is unknown, so the watch is sold as-is. The original dial has some outer marker printing loss on the edge of the dial between 7 and 10. The lume appears original and registers strongly on my radiation meter. Overall its a nice looking example. With the exception of the paint loss on the dial, its in nice condition with attractive applied hour markers and numerals at 12 and 6. The case is also in nice condition with typical signs of use for a nearly 70 year old watch. Im not sure of the actual year of production and welcome any additional information or corrections in the comments. The crown is unsigned which is correct for this reference, it was sold to me as original to the watch but I have no way to verify. The movement is triple signed. PRICE: $1,950 includes insured shipping in the US. World wide shipping available at actual cost. Wire Transfer or PayPal + 4% Feedback is available upon request. Added movement and detail images.