HEUER Chronosplit Repair and Modules

HEUER Chronosplit GMT - Main Page

in 1977 Heuer launched the Chronosplit GMT Manhattan Calibre 104, it was the first Chronosplit to feature an analogue time display and independent LCD digital time/chronograph in a wristwatch. To quote an old 1979 Heuer advertisement that can be seen below: "The perfect combination of analog [sic] quartz watch and digital stop-watch."

 

The Manhattan GMT also moved away from the curvaceous case style of the previous Chronosplit design and adopted  a rather unique blend of bullhead and coffin-shaped styles, to quote Heuer again; "Heuer - the New Look in Chronographs"

 

The Chronosplit GMT as the name implies can display two time zones simultaneously, one on the top digital display, and the second on the bottom analogue display even when the 1/100-second chronograph is running.

 

In 1979 Heuer then produced a more rounded derivative of the Chronosplit Manhattan GMT called the Calibre 107 Senator GMT. The Senator essentially used the same upper module as the Manhattan but marked it cal. 107.  The quartz analogue lower display uses a six-jewel ESA 935.102 module for the analogue, whereas the Manhattan uses a four-jewel Citizen-derived movement. Please see Fig.2

 

On the next pages I discuss faults.

Fig 1. Heuer Chronosplit GMT Manhattan & Senator both with fitted Rawsar H3 modules running original LCD displays.

Chronosplit Manhattan and Chronsoplit Senator

Fig 2. Manhattan and Senator internals. Same upper module, different Calibre markings.

Fig 3.  1979 UK Heuer advertisement for the Chronosplit GMT Manhattan.

Fig 4. Heuer marketing material from around 1979.

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