A ref. 112.021 Lange 1A, the first limited edition Lange 1 from 1998. Created in 1998 to mark the opening of a new production building — proof the 1990 resurrection had taken hold — its name echoes the "1A" quality grade Ferdinand Adolph Lange reserved for his finest pocket watches. It features a 38.5mm yellow gold case, solid 18k gold dial with radiant guilloché and gold date disc, and the calibre L901.1, its hand-engraved balance and escape-wheel cocks rendered in solid gold with a white gold escape wheel and lever. This ref. 112.021 remains an elusive symphony in excess, the first limited edition Lange 1 and true harbinger of 1A quality—nearly a century after that convention began.