Vitruvius's Slide Rule
"One of the nicest plastic body rules ever made, with anodized adjustable aluminum end braces, duplex 5/4-line cursor, two color (red/black) scale markings, and trademark mint green stripe on primary scales (both sides), plus additional blue stripes on the A and B scales, and massive 2 1/4" wide body.
"This rule also has expanded W square root scales, for both the square root of x and 10x, and raised rubber bumpers to prevent cursor scraping, and to give the rule grip on a desktop. The rule also has finger-grip areas on the slide for better movement.
"Body is fully alignable at the aluminum endpieces. The rule was packaged in either a green plastic display case or a green leather case, with an accessory scale and manual.
"Rule is self documenting on right hand side for all scales. A very powerful and beautifully made log log rule, equal to the K+E 4181-3, Deci-lon and Post versalog 1460, if not far better. Has pythagorean scale (P), expanded square scales, folded scales and scale over-ranges.
"There are 30 scales and 11 cursor lines; on the front: T1, T2, K, A, DF, [ CF, B, CIF, CI, C, ] D, DI, S, ST, and P, and on the back: LL03, LL02, LL01, LL00, W2 [ W2', CI, L, C, W1', ] W1, LL0, LL1, LL2, and LL3."
Thirty-three years, and she still works like new.
Front side, leather belt-sheath, and accessory scales.
Back side along with its included instruction manual.
Original Faber-Castell 2/83 catalogue page one.
Original Faber-Castell 2/83 catalogue page two.
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