Full Details

Name and Model Number Pickett N200-ES (Green)
Country of Origin USA
Date of Manufacture 1957 - 1967
Front Scales K, A [B, CI, C] D, L
Back Scales [S, ST, C] D
Scale Length 6"
Type of Rule Slide Rule
Construction Aluminum
Area of Use Other
Comment For precision math and trigonometry.
Green, although marked "ES" (Eye Saver Yellow)
Rarity RRR
Donor Collection of Ron Knapp, USA
Match Number 81
(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.