{"product_id":"very-rare-scottish-long-arm-protractor-by-alex-mabon-sons","title":"VERY RARE Scottish Long Arm Protractor by Alex Mabon \u0026 Sons","description":"\u003cp\u003eHere we have a VERY RARE early 20th century Scottish long arm angle protractor with MICRO adjustment by ALEX MABON \u0026amp; SONS of GLASGOW. This is a wonderful quality scientific instrument made specifically for the mining industry. It comes with the original mahogany box with metal makers plate inside. \u003cspan\u003eAlex Mabon \u0026amp; Sons were the leading supplier of mining instruments in Scotland in the early 20th century, carrying a range of high quality instruments including theodolites, surveyors compasses and protractors. This specific instrument was used to work out the side angle of large scrag heaps to make sure the angle was not too steep to allow for collapse after various mining disasters associated with scrag heaps. This particular version of the tool with the micro adjustment is particuarly rare. 24 1\/2\" long. \u003c\/span\u003e\u003c\/p\u003e","brand":"Alex Mabon \u0026 Sons of Glasgow","offers":[{"title":"Default Title","offer_id":56738800206210,"sku":"T5034","price":200.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0604\/0207\/3761\/files\/T5034.jpg?v=1782746203","url":"https:\/\/www.toolbazaar.co.uk\/products\/very-rare-scottish-long-arm-protractor-by-alex-mabon-sons","provider":"Tool Bazaar","version":"1.0","type":"link"}