Rare Antique Duroni & C. Milano Back-to-Back Pocket Barometer Altimeter Compendium (Late 19th – Early 20th Century). Up for sale is a highly collectible and exceptionally rare matching-piece antique pocket scientific compendium. Crafted by the renowned Italian scientific instrument maker. ? KEY FEATURES & SPECIFICATIONS. Top Dial (Barometer & Altimeter). Measures atmospheric pressure in cmHg (60-80 range) featuring classic Italian weather forecasting terms. The outer rotating silver/brass ring is an altimeter scaled up to 4,500 METROS (Meters). Bottom Dial (Compass & Thermometer). Features a central directional compass with classic continental lettering (N, S, O, E) and an outer ring Centigrade (°C) thermometer. A clever “Back-to-Back” double-sided pocket watch style case that screws together into one compact unit for traveling protection. ?? GUARANTEED CONDITION REPORT. Unlike most century-old instruments found on the market, this piece is in. 100% Fully Functional / Working Order. The aneroid barometer capsule is intact and responsive to pressure changes. The thermometer moves correctly according to temperature changes. The compass needle swings freely and aligns properly. The original brass connecting threads are sharp, clean, unstripped, and screw together beautifully flush and tight. The heavy brass casing retains a gorgeous, untouched natural aged dark patina. No cracks to the crystals/glass. Due to the delicate internal chains and vacuum capsule, this item will be packaged with professional-grade bubble wrap and a heavy-duty box. Worldwide with full online tracking. Please check all the high-resolution photos carefully as they form part of the description. Feel free to send a message if you have any questions or require further close-up pictures. Don’t miss this museum-quality Italian masterpiece!
