The Trutempus Buren Swiss 21 Jewel Pocket Watch is a mechanical (manual) movement with a Buren brand. It is missing its casing and is in need of parts and repair. This pocket watch is a valuable collector's item for those interested in horology and vintage timepieces. The 21 jewels within the movement add to its precision and reliability, making it a unique and sought-after piece for watch enthusiasts.