|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|
|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.
|Donor||Collection of Ron Knapp|
(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.|