A. Lange & Söhne 1815 34mm (2025) 

Cased in 18k white gold in 34mm diameter with 6.4mm thickness. Sapphire crystal front and back. No mention of the water-resistance. The dial is blue solid silver, galvanized dial, 18k white lancet hands. The movement is powered by Lange manufacture calibre L152.1, ultra-thin manual-winding, German silver plates and bridges, balance cock engraved by hand. Power reserve is 72 hours. Priced at €27,000