The reference 503.24 E
This reference was launched in circa 1964 and was in production for around five years.
This model is one of the “Pendulette a remontage automatique par la lumiere” (clock with automatic winding by light) collection launched in the 1960’s, of which the “Pendule Carrée” (square clock) is the most common; it is with the “Dome” clock the most classical table timepieces made by Patek Philippe. All of them are wound with the sun energy, through captors that power the mechanical 17-250 E calibre, a pocket watch movement, laying horizontally.
The Ref. 503.24 E is made of gilt brass cabinet with satin-finish, silvered metal dial and gilded brass “Baton” hands. Very few examples were produced, of which 15 are known to this day (four of them were delivered to Tiffany & Co, New York).