1960s Doxa Sfygmos Pulsometer Monopusher Chronograph | Valjoux 23

A rare 1960s medical watch, the Doxa Sfygmos pulsometer monopusher takes its name from the Greek word for “pulsation” and was designed for doctors who needed to time a pulse with one hand. The single pusher at 2 o’clock controls start, stop, and reset with one finger, leaving the other hand free to handle the stethoscope during examination. This purposeful layout makes the Sfygmos makes it a rare bird among other vintage chronographs of the same era.

Contrary to what some online sources suggest, the dial is not split into two physical levels: both the hour track and the pulsation scale are printed on a single, flat dial. What creates the impression of a stepped construction is the internal ring-shaped “cyclops” that sits beneath the crystal, encircling and magnifying the pulsation markings. This under-crystal magnifier gives the outer ring extra emphasis while leaving the central hours crisp and clean, resulting in a uniquely three-dimensional look without a multi-part dial.

Instead of the usual 12 o’clock reset, the Doxa Sfygmos starts and resets its chronograph seconds hand at 9 o’clock, adding a unique touch to this watch.

Inside, the Sfygmos is powered by Valjoux 23, a hand-wound, column-wheel chronograph caliber that is a benchmark of mid-century chronograph design. Known for its precise actuation, robust construction, and enduring reliability, the Valjoux 72 was the movement of choice for many respected brands of the era and remains highly regarded among collectors today.

Key Features of this Doxa Sfygmos Monopusher Chronograph:

• 35mm case size | 18mm lug width
• A monopusher pulsometer designed for Doctors
• really cool italic font used for "Sfygmos", giving it a retro-futuristic / techno vibe
• Unusual internal circular “cyclops” ring magnifying the pulsation scale from beneath the crystal
• Unusual placement of second hand at 9 o'clock
• Manual-wind Valjoux 23 column-wheel chronograph movement
• Sword-shaped hour hands