The product is a rare vintage Swiss Baume Mercier chronograph movement by Landeron, specifically designed for Baume & Mercier watches. This mechanical (manual) movement is from Switzerland and is a sought-after item for watch enthusiasts looking for spare parts or repairing their timepieces. The Landeron brand and Swiss origin add to the authenticity and quality of this unique piece for collectors and watchmakers alike. very clean rare movement balance wheel moves freely for spares or repairs only