Timekeepers Club / July 17, 2021

Baltic Pulsometer Chronograph Monopusher 1/1 for Only Watch 2021

BALTIC is happy to join the ONLY WATCH auction to help fighting against Duchenne Muscular dystrophy. As an analogy we have created a unique Monopusher Pulsometer chronograph using an old 1940’s Venus 150 monopusher movement.

This scale is used in conjunction with the watch’s chronograph complication to provide medical information. This pulsometer scale is calibrated for 30 heartbeats (or pulsations). Start the chronograph timer and count the beats until you get to 30 pulsations. Stop the chrono and you will read the heart rate in beats per minute.

VENUS 150 Monopusher Pulsometer

Pulsations are at the heart of any living entities: inside this chronograph beats an old Venus from 1940’s which has been doing its job for more than 80 years. This monopusher caliber has been entirely renewed in Switzerland to run smoothly these thin gold leafs hands around a beautiful glossy black dial. 

As an evocation to the 40’s, we have designed a profound black dial on which we’ve applied a set of Breguet indexes that gives superb reflections and reliefs. Only one marking is appearing on the dial : « 1/1 ». A simple and powerful mention that explains everything ONLY WATCH is about.

Prototype unique case and applied Breguet indexes dial, 40’s venus 150 monopusher renewed in Switzerland. The soul of the paster mixed into a unique new timepiece for Only Watch.

We would like to warmly thank all the people who helped us on this amazing project. We are very pleased to participate and involve a young passionate horology generation. Mickael, Charles, Jas, Rémy, Julien and Nicolas have done a wonderful job and brought their expertise.


Technical specifications:

BALTIC Pulsometer Chronograph Monopusher 1/1

Unique piece for Only Watch 2021


  • Material: Stainless steel
  • Diameter: 36 mm
  • Glass: Sapphire crystal front and caseback

Dial and hands

  • Glossy black dial
  • Breguet applied indexes
  • Pulsometer scale
  • 30min-counter at 3 o’clock
  • Small seconds at 9 o’clock
  • Central chronograph counter


  • 1940’s original Venus 150
  • A unique prototype chronograph monopusher using an old refurbished venus 150
  • Mechanical manually wound movement, column wheel
  • Chronograph with monopusher action.

Strap and buckle

  • ABP Paris hand-stitched calf strap with stainless steel buckle.

MSRP: Up for auction

Estimate: CHF 13'000 - 17'000

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