Full Details

Name and Model Number Pickett N4-ES with
Barrel Magnifying Cursor
Country of Origin USA
Date of Manufacture 1960s
Front Scales 3 cube root scales, DF, | CF, CIF, T, T, ST, S, CI, C, | D, DI, 2 sq. root scales
Back Scales LL1+, LL1-, LL2+, LL2-,DF/M | DCF/M, TH, SH, Ln, L, CI, C, | D, LL3+, LL3-, LL4+, LL4-
Scale Length 10" (25 cm)
Type of Rule Slide Rule
Construction Aluminum
Area of Use Generic
Comment Has very rare barrel magnifying cursor.
Rarity RRR
Donor Collection of Louis J. Gotlib, USA
Match Number 42
(Click Picture for Details)

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.