[jackyickx53]

   

...and this is the Dutray Le Mans clock on its gantry, with situation lights, suspended from the pits.

Dutray is a watchmaker/jeweler in the village of Le Mans, which donated the official clock.  I believe it was added in 1931.

The clock remained until 1974 when it was replaced by a Tissot for a short while.  Nothing will ever replace the Dutray clock in the hearts of fans.  Most especially the garish R*lex which adorns the modern pits complex.  And the less said about the modern pits and clock the better.