Hamilton Chronomatic B

Hamilton Chronomatic B

In 1969, Hamilton, Heuer, and Breitling united in a quest to develop the first automatic chronograph, a project that they dubbed "Project 99."  

Project 99 utilized Buren's "Intra-Matic" micro-rotor in the development of their automatic chronograph movement. The "Intra-Matic" was revolutionary in that it eliminated the external oscillating weight found in most automatic movements, instead integrating it into the body of the movement. It was integral to the construction of the automatic chronograph movement that soon was dubbed the "Chrono-Matic."

The "Chrono-Matic" (or Caliber 11) debuted in March of 1969, ahead of the Movado/Zenith movement, El Primero. 

Heuer used the name "Chrono-Matic" for their earliest automatic chronographs. Examples with that branding can fetch tremendous dollars at auction, as Heuer quickly abandoned the shared branding in favor of their own "Caliber 11" moniker shortly after the development was complete. Both Hamilton and Breitling hung on to it for longer.

This particular Chronomatic B is in exceptional condition mechanically, recently serviced, an important consideration for this oftentimes fickle movement. 

To learn more about the development of the Caliber 11 movement, check out this article. 


Stainless steel case is approximately 37mm (excluding crown and pushers). Hamilton Ref. 11002-3, Chrono-Matic self-winding movement. Circa 1970s.

Overall Condition: Stainless steel case is in very good condition, showing signs of light but careful polishing. Dial is in very good condition, showing some signs of age, particularly to the tachymeter ring near 2 o'clock. Signed crown. Signed case back has some signs of use and wear but is in otherwise very good condition.

Includes one 19mm blue genuine shark skin strap and two 19mm nylon straps from Crown & Buckle

SKU: TT01153

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