EXTRA-FORT ROUE À COLONNES Grande Date Ref. 31146PD Steel 41 mm | Box and Papers's Eberhard, 2010

Pre-Owned watch

• Automatic winding mechanical movement with column-wheel. Chronographic movement, 28800 vibrations per hour. Regulator for fine adjustment. 'Glucydur' balance for regulating the movement, combined with a self-compensating spiral; it is hence insensitive to temperature fluctuations and ensures an optimum regulation of the movement. 28 jewels with gilt circular incision. 42 hours of power reserve. Bridge of the Chrono and rotor 'Coted de Genève', other bridges, and platinum circular-grained. Blue screws. 
• Steel case, 41 mm.  size. Screw-in crown.  
• Silvered dial with Roman numerals and rhodium-plated index quarters, applied. Big date at 12 o'clock. 'Dauphine' hands rhodium-plated. Three guillochè sub-dials: at 3 o'clock small minutes-hand of the chronograph; at 6 o'clock small hours-hand of the chronograph and at 9 o'clock small continuous seconds-hand.
• Domed sapphire glass anti-reflective. Transparent case back sapphire glass fixed by 6 screws. 
• Original leather strap 
• Original and patented folding clasp Dèclic, Eberhard & Co.