Manufacture
Bill's latest update on the Lebois & Co P25 project offers a fascinating glimpse into the meticulous refinement of a modern chronograph. His post details crucial aesthetic adjustments, specifically the re-engineered hands, and provides an exclusive opportunity for collectors to experience the prototype firsthand. This commitment to detail underscores the brand's dedication to horological excellence, making Bill's insights invaluable for enthusiasts tracking the P25's journey to production.
A few days ago, we were presented with the reworked hands for our P25 Lebois . The hands are now produced in a lighter shade of blue, which is much closer to the blue used for the dial printing. The result is a much better visual harmony between the hands and the dial.
A new set of these hands will now be fitted to the prototype. As soon as I receive photos of the prototype with the correct hands installed, I will, of course, share them here.
For those of you who may be in Switzerland during Watches and Wonders (April 14–19) , there is also an opportunity to see the watch in person.
Tom (owner of Lebois & Co and Airain ) will be present throughout the week at the Time to Watches exhibition held at Villa Sarasin , located right next to Palexpo , where Watch and Wonders takes place. Lebois & Co and Airain will be exhibiting on the first floor .
If you happen to stop by, you will not only have the chance to chat with Tom, but he will also have the P25 prototype with him , so you will be able to see it in the metal.
More updates soon once the new prototype photos arrive.
Best,
Bill
Hamilton's pulsation chronographs represent a specialized branch of medical timekeeping that emerged in the early-to-mid 20th century when physicians required precise instruments for measuring patient vital signs. The pulsations scale, clearly visible on this dial's outer track, allowed medical professionals to calculate heart rates by timing a specific number of pulse beats rather than counting for a full minute. This practical application positioned Hamilton as a serious tool watch manufacturer beyond their railroad heritage.
The technical execution demonstrates Hamilton's commitment to legibility and functionality over decorative flourishes. The bi-compax layout provides clear separation between the running seconds and chronograph minutes, while the pulsations graduations are calibrated for 30 pulsations as indicated on the dial perimeter. The blued steel hands offer strong contrast against the white enamel-style dial, essential for quick readings in clinical environments. The spare parts visible in the image suggest either restoration work or the modular nature of mid-century chronograph construction.
While not commanding the premiums of Swiss contemporaries, Hamilton pulsation chronographs occupy a specific niche among collectors of medical and professional timepieces. Their American heritage and functional design language appeal to enthusiasts seeking alternatives to more common tachymeter chronographs. The survival rate of these specialized pieces tends to be lower due to their working tool status, making examples in restorable condition increasingly sought after in the vintage market.
so that we might someday receive one of these beauties?
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