|Name and Model Number||Nestler Rechen-Walze |
|Country of Origin||Germany|
|Date of Manufacture||c.1930|
|Front Scales||C and D scales in 30 sections|
|Scale Length||3.75 m|
|Type of Rule||Cylinder|
|Construction||Paper scales on metal cylinder (33.5 cm long x 9 cm dia.) on metal stand.|
|Area of Use||Generic|
|Comment||Unusual scale length. Most Swiss cylindrical slide rules do not have fractional scale lengths.
Marked: "Nestler's Rechen-Walze 3.75m, Albert Nestler A.-G. Lahr i/B.
Often used by bankers.
|Donor||Collection of Ed Chamberlain|
(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.|