Staedtler Mars 964 51-6 Adjustable Gradient Ruler

Staedtler Mars GmbH & Co. KG (German pronunciation: [ˈʃtɛtlɐ]) is a German multinational stationery manufacturing company based in Nuremberg. The firm was founded by J.S. Staedtler (1800–1872) in 1835 and produces a large variety of stationery products, such as writing implements (including technical drawing instruments),[1] art materials, and office supplies. Staedtler claims to be the largest European manufacturer of wood-cased pencils, overhead projector pens, mechanical pencils, leads, erasers, and modelling clays. Staedtler has over 26 global subsidiaries and nine manufacturing facilities. Almost two thirds of the production take place in the four production facilities in Nuremberg, Germany,[4] though some of its products are made in Japan. Its "Noris' line of pencils is extremely common in British schools. More info at https://www.staedtler.com/ca/en/company/about-staedtler/history/ https://en.wikipedia.org/wiki/Staedtler