Complication · Timing
Doctor's (Pulsation) Chronograph
Partially verifiedA chronograph fitted with a pulsometer scale and marketed specifically as a clinical instrument for taking a patient's pulse rate quickly at the bedside, a specialised application of the pulsometer scale rather than a mechanically distinct complication.
Definition
A chronograph fitted with a pulsometer scale and marketed specifically as a clinical instrument for taking a patient's pulse rate quickly at the bedside, a specialised application of the pulsometer scale rather than a mechanically distinct complication.
Historical origin
Pulsation watches and chronographs were produced and marketed to the medical profession from the late nineteenth century, when a reliable portable timer offered a real improvement over counting a full minute by an ordinary watch, and remained a recognised product category through the mid-twentieth century.
How it works
Mechanically, a doctor's chronograph is an ordinary chronograph (see Chronograph) fitted with a pulsometer scale, most often calibrated for 15 or 30 pulsations; nothing in the going or chronograph train differs from a standard chronograph of the same grade.
In use, the physician starts the chronograph at the first pulse beat, counts the number of beats printed on the scale, and stops the hand at the final beat, reading the patient's pulse rate (in beats per minute) directly from the scale rather than performing the multiplication by hand.
Because the clinical use case demanded quick, repeated readings, doctor's chronographs were sometimes fitted with more robust or larger, easier-to-operate pushers than an equivalent sporting chronograph, though this is a matter of case design rather than movement architecture.
Pocket watch context
The classic form of the complication: a chronograph pocket watch, often plainly cased for professional use, with a pulsometer scale printed around the dial and sometimes explicit medical branding or retailer marks from instrument or medical-supply houses.
Wristwatch context
Continued into the wristwatch era as physicians adopted wristwatches generally; some modern manufacturers still produce pulsometer-scale chronographs referencing this medical heritage, though most are sold today as a vintage-styled dress or sport watch rather than an actively used clinical tool.
Identification
- A chronograph movement combined with a pulsometer scale calibrated for a stated beat count (commonly 15 or 30)
- Sometimes carries medical-supply retailer signatures or explicit 'pulsations' wording on the dial
- The underlying chronograph mechanism should be assessed on its own terms (column wheel or cam, monopusher or two-pusher) independently of the pulsometer scale
Servicing notes
As with any chronograph, reliable operation depends on correct return-to-zero and hammer alignment; there is no additional mechanism specific to the 'doctor's' designation to service, only the pulsometer dial printing to preserve during any dial or crystal work.
General guidance only. Complicated mechanisms should be assessed and serviced by a qualified watchmaker or clockmaker specialist, not adjusted at home.
Related photographs
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No confidently matched photograph of this subject has been found yet. These photographs show a closely related record, and are not examples of the type described on this page.
Sources & references
- de Carle, D., Complicated Watches and Their Repair
- Extent and dating of the earliest dedicated 'doctor's chronograph' marketing not independently established from sources consulted.
Where sources disagree, the disagreement is stated rather than resolved silently.