{"product_id":"brown-boveri-cie-bbc-mannheim-mechanisch-rekeninstrument-met-doos","title":"Brown, Boveri \u0026 Cie (BBC) Mannheim Mechanical Calculating Instrument with Case\n","description":"A distinctive piece of early twentieth-century industrial heritage: a mechanical calculating instrument by Brown, Boveri \u0026 Cie (BBC) Aktiengesellschaft, Mannheim. An engaging collectible for enthusiasts of early calculating tools, mechanical calculators, and European industrial history.\n\nAccording to the seller's information, this is an early mechanical calculating device, possibly a Vektoren-Rechenschieber (vector slide rule) or current-draw calculator, dating from approximately the 1920s–1940s. Its precise function and date have not been independently established. The instrument bears the D.R.G.M. marking. According to the seller, instruments of this type were used by engineers for industrial calculations in the field.\n\nSupplied in a black storage case with green lining and BBC lettering on the lid, described by the seller as original. The metal components, graduated scales, and maker's markings give this piece its distinctive technical character.\n\nCondition: Vintage condition with visible scratches, wear, and signs of use on the instrument and case. Described by the seller as complete; original completeness, operation, and calculating accuracy have not been independently verified. Please examine all six photos carefully for details and condition.\n\nBrand: Brown, Boveri \u0026 Cie (BBC) Aktiengesellschaft, Mannheim\nType: Mechanical calculating instrument; exact application unconfirmed\nMarking: D.R.G.M.\nSeller-attributed date: Approximately 1920s–1940s\nStated dimensions: 10 × 10 × 3.5 cm\nStated weight: 233 g\nIncludes: Storage case with green lining\n\nOnly one example of this item is available. Tracked shipping is calculated separately.\n","brand":"Brown, Boveri \u0026 Cie (BBC)","offers":[{"title":"Default Title","offer_id":59278315290888,"sku":null,"price":75.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1056\/0336\/7176\/files\/12088.jpg?v=1793271009","url":"https:\/\/continentalvintage.com\/products\/brown-boveri-cie-bbc-mannheim-mechanisch-rekeninstrument-met-doos","provider":"continentalvintage.com","version":"1.0","type":"link"}