A. Lange & Söhne. A Fine Platinum Twin Barrel Wristwatch with Oversized Date and Power ReserveSigned A. Lange & Söhne, Glashütte I/SA, Doppelfederhaus, Lange 1 Model, Ref. 101.005, Movement No. 158, Case No. 110.205, Circa 1996Cal. L901.0 three quarter plate mechanical movement with twin spring barrels, 53 jewels, screwed gold chatons, finely hand-engraved balance bridge, silvered matted dial, applied Roman and lozenge-shaped numerals, large double aperture for date, eccentric engine-turned subsidiary dial for constant seconds, fan-form sector for power reserve, circular case with date change button in the band, case back secured by six screws, platinum A. Lange & Söhne buckle, case, dial, and movement signed38.5mm diam.