There were also several different types of cursors used by Faber Castell, and some rules were also made as large classroom demonstration rules.Īs a result of this over-all design style and part number format, there are often very similar Faber-Castell rules which differ only in the body design, and essentially identical rules which differ only in scale length. As with other makers, the inevitable ' N' crept in to part numbers at the end to indicate ' New' versions of rules, which were often quite different visually than the originals. The first number to the left of the ' /' generally indicated rule size and construction type, and the second number to the right of the ' /' the specific scale set. Later, their rules were organized around specific scale groups (Darmstadt, Rietz, Commerz, Duplex, Novo-duplex, Mathema, etc.), and then implemented in several different construction styles, starting with 1/series for full size 10 inch/25cm wood, 2/series for full size 10 inch/25cm adjustable Geroplast, 3/series for 15 inch wood, 4/series for 20 inch/50cm wood, 62/series for pocket size duplex adjustable Geroplast, 63/series for fixed pocket size duplex Geroplast and so on. Very early wood body rules rules have 3-digit numbers like '361'. Faber-Castell slide rules were made mainly in Germany (plus Switzerland and Austria), and are some of the most elegant and well designed slide rules ever produced. HERE is the FC catalog page that shows the various rules in a chart.Ī. Thanks to Peter Holland in Germany for this list of known Faber and Faber-Castell Slide rules:

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