{"product_id":"ivo-probator-mechanische-toerenteller-met-houten-cassette-ca-1940-1955","title":"IVO Probator Mechanical Hand Tachometer with Wooden Case – c. 1940–1955\n","description":"Vintage mechanical hand tachometer, model Probator, attributed to the German manufacturer IVO (Irion \u0026 Vosseler) of Schwenningen. According to the seller’s information, the instrument dates to circa 1940–1955, making it a characterful example of prewar or early postwar precision mechanics.\n\nThis extensive set includes the tachometer, a wooden storage case described by the seller as original, the original German Gebrauchs-Anweisung instruction sheet bearing the D.R.P. (Deutsches Reichspatent) marking, and two contact attachments with rubber contact surfaces. Its black housing, cream-colored circular dial and mechanical counter give the instrument an authentic industrial appearance.\n\nThe accompanying German instructions describe measuring the revolutions of shafts on machinery and engines and specify use up to 6,000 revolutions per minute. An appealing collectible for enthusiasts of historical measuring instruments, industrial technology and German precision mechanics.\n\nDETAILS\n\nBrand and model: IVO (Irion \u0026 Vosseler), Probator Hand Tourenzähler \/ tachometer, as identified by the seller\nOrigin: Schwenningen, Germany, according to the seller\nEstimated date: circa 1940–1955, according to the seller\nDimensions: approximately 15 × 5 × 4 cm\nStated weight: 325 grams\nIncludes: wooden storage case, German instruction sheet and two contact attachments\n\nCONDITION\n\nAttractive vintage appearance with visible signs of use and age on the housing and wooden case. The instruction sheet shows folds and age-related wear. Operation has not been confirmed, and calibrated measuring accuracy is not guaranteed. Please examine the photographs carefully for the condition and included components.\n\nOnly one example of this item is available. Tracked shipping is charged separately.\n","brand":"IVO (Irion \u0026 Vosseler)","offers":[{"title":"Default Title","offer_id":59176289599752,"sku":null,"price":125.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1056\/0336\/7176\/files\/11155_30cb84c3-5950-4b54-9606-fccda6cabef6.jpg?v=1792571541","url":"https:\/\/continentalvintage.com\/products\/ivo-probator-mechanische-toerenteller-met-houten-cassette-ca-1940-1955","provider":"continentalvintage.com","version":"1.0","type":"link"}