Jaeger-LeCoultre. 18k yellow gold Duo dial Night and Day wristwatch, Reverso Duo Night and Day, Ref:270.1.54, case No.1972635, Sold 9 November 2003 21-jewel manual winding movement, rectangular silvered dial with arabic chapter ring enclosing guilloche centre, subsidiary seconds, blued steel hands, the reverse silver guilloche and engine-turning dial with intersecting 12-hour and 24-hour arabic chapter rings, button in case band to independently set hour, characteristic reversing rectangular case with reeded ends, case, dial and movement signed, maker's brown ostrich leather strap and signed 18 carat gold deployant clasp, with maker's case, guarantee and instruction manual, 26.0 x 42.0 mm