The product is a rare antique 1870 Perret Co Geneve Thermometer Pocket Watch, a unique timepiece featuring a mechanical (manual) movement with 15 jewels. This vintage piece has a full hunter closure, Roman numerals on the indices, and a thermometer feature, making it a scientific medical specialty watch. The pocket watch has an 18 size, yellow gold dial color, silver case color, and a snap caseback. Made in Switzerland, this antique pocket watch is a special and collectible item for watch enthusiasts.

For your consideration is an exceptionally rare, museum-grade mid-to-late 19th-century scientific/medical pocket watch manufactured by Perret & Co. (Genève, Switzerland). This exquisite timepiece features a highly unique white porcelain diagnostic dial hosting an integrated mechanical thermometer reading in Fahrenheit (10°F to 150°F), powered by a specialized internal bimetallic coil. The dial further features a sub-seconds register and an outer quarter-second track designed for pulse timing.The watch is housed in its original, heavy Warranted Coin Silver case displaying a wonderfully preserved, ultra-fine engine-turned barleycorn background with hand-engraved floriated cartouches and a central star motif. The inner dust cover is fully signed and reveals a key-wind, key-set "Patent Lever" configuration. Underneath, the movement is an absolute work of art, boasting a pristine Swiss finger-bridge architecture layout with polished jewel pivots. The case engraving lines are incredibly crisp with minimal pocket wear and a beautiful, honest natural patina. An irreplaceable addition to any advanced horological or antique medical instrument collection. Sold as-is. Please see photos for exact condition. No returns and all sales are final. Thank you!