Full Details


Name and Model Number Pickett X-3 Executive
Country of Origin USA
Date of Manufacture ?
Front Scales 1, 2, K, A [B, ST, S/Cos, T1, T2, CI, C] D, DI, 3 1, 3 2, 3 3
Back Scales LL0, LL1, DF [ CF, CIF, Ln, L, CI, C ] D, LL2, LL3
Scale Length 25 cm
Type of Rule Slide Rule
Construction Aluminum
Area of Use Generic
Comment Power Log Exponential - Log Log Dual Base.
Based on Picket model N3.
Special model made for Pickett Executives.
Rarity RR
Donor Collection of Clay Castleberry
Match Number 240
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In conjunction with our 'donors' we assign a rarity rating to each item, based on the system devised by Herman van Herwijnen
(1929 - 2004), renowned Dutch collector, author, and creator of Herman's Archive, a collection of 5,000 slide rule images on CD.
• RR = Rare - 1 of 25 collectors has one; it may take a year to find an example in the marketplace.
• RRR = Very Rare - only a few known to collectors; may be several years before it comes up for sale.
• RRRR = Extremely Rare - a museum piece; unlikely that an example will come up for sale.