18ct White Gold A. Lange & Sohne 1815 Chronograph. Ref 402.026. Polished and brushed white gold case. 39mm diameter, 8.7mm deep with sapphire crystal see through case back. Hand wound mechanical movement, Movement: A. Lange & Sohne Caliber L951.5, beats at 18,000 vph, composed out of 306 parts, contains 34 Jewels & has an approximate power reserve of 60 hours. Silver dial, with silver sub-dials, Arabic numeral hour markers. Black croc strap with 18ct Lang & Sohne buckle. Box and papers dated January 2011. Our reference S22001.