A. Lange & Söhne. A Very Fine and Rare 18k Honey-Colored Gold Limited Edition Tourbillon Wristwatch with Power Reserve, Date, and Hack FeatureSigned A. Lange & Söhne, Glashütte I/SA, Homage to F.A. Lange Edition, Lange 1 Tourbillon Model, No. 148/150, Ref. 722.050, Movement No. 82'155, Case No. 192'004, Circa 2010Cal. L961.2 three-quarter plate mechanical movement, 49 jewels, screwed gold chatons, finely hand-engraved balance cock, silvered matte dial, eccentric guilloché time display with applied Roman and diamond-shaped numerals and subsidiary dial for constant seconds, large double aperture for date, fan-form power reserve sector, aperture for one-minute tourbillon carriage visible through the dial, circular case, sapphire crystal display back secured by six screws, button in the band for date change, 18k honey-colored gold A. Lange & Söhne buckle, case, dial, and movement signed38mm diam.