Full Details


Name and Model Number Pickett Model 525-ES LOROP
Country of Origin USA
Date of Manufacture c. 1960
Front Scales Specialized Csc1, Sec1, D [ E, Csc2, Sec2, K, C ] J, Q, Qa
Back Scales Specialized A, D, Cot/Tan [ C, CI, B ] C+, C-, C*
Scale Length 25 cm
Type of Rule Slide Rule
Construction Aluminum
Area of Use Photography
Comment LOROP = LOng Range Oblique Photographic camera.
Oblique Photography Mensuration Slide Rule.
This extremely uncommon slide rule may be RRRR = Extremely Rare -- a museum piece; unlikely that an example will come up for sale.
Rarity RRR
Donor Collection of Ron Knapp
Match Number 253
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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.