Original artwork description:

extra fort
The chronograph with the sled! A button at 2 o'clock to start, stop and reset the chronograph
The slide at 4 o'clock to stop and restart the hand.
The meaning of the name extra fort name is debated by collectors.
The larger than usual 40 mm case?
The sled system that prevents accidental reset of the chronograph?
The particular the shockproof system on the rocker arm?
Most likely for the exclusively gold case
much more resistant in the part that joins the strap

Materials used:

Graphite

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