|Name and Model Number||Curta Calculator Model II|
|Country of Origin||Lichtenstein|
|Date of Manufacture||1946-1960|
|Capacity||Setting register =11, Counter register = 8, Result register = 15|
|Area of Use||Generic|
|Comment||A series of rotating internal rods reflecting answers on the external registers.
This example has a leather case as well as a metal "can" to protect the calculator.
This model was very popular for field work such as surveying. .
|Donor||Collection of Clay Castleberry|
(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.|