Model: Reverso Night & Day Reference: 270.3.54 Date: Purchased 22nd August 1998 Movement: 21-jewel Cal.854 manual wind Dial: One black with guilloché engraved centre, applied polished dart hour markers and Arabic numeral quarters, white inner minute divisions, subsidiary seconds at 6, polished lance hands, the other guilloché engraved salmon pink, applied dart hour markers, luminous Arabic numeral quarters, 24-hour indication at 6, polished sword hands with luminous inserts Case: Brushed and polished reversible rectangular, reeded ends, quick set button in the band, No.1871496 Strap/Bracelet: Black leather Buckle/Clasp: Signed 18K white gold folding clasp Signed: Case, dial & movement Size: 26mm x 36mm Accompaniments: Jaeger-LeCoultre box, outer card, original sales receipt, service receipt, Certificate of Guarantee, instruction manual 注脚 The idea of the Reverso was sparked at a polo game in India in 1930. Cesar de Trey, a former denture dealer turned watch entrepreneur was on a trip in India when a Polo player showed him the broken glass on his watch. Seeing the broken watch gave Cesar de Trey the idea of a watch that could turn over to protect its crystal and dial from being damaged. Upon his return to Switzerland, Cesar de Trey joined forces with his business partner Jacques David LeCoultre and launched the first Reverso in 1931. The Parisian engineer Rene-Alfred Chauvot was commissioned by LeCoultre and Jaeger to construct the first Reverso.