A. Lange & Söhne Grand Lange 1 817.025, 2000s Platinum round case, n.164492, diamond-set bezel, display back. Two-tone argenté dial, applied indexes and roman numerals, large date and power reserve indication. Hand-winding movement, cal.L901.2, n.49228. Leather strap and A. Lange & Söhne platinum buckle. Size: 42 mm.  Accompanied by A. Lange & Söhne extract from the archives confirming the production of the watch with a bezel set with 52 diamonds, box and outer box.