|Name and Model Number||Small Pocket Calculator|
|Country of Origin||USA|
|Date of Manufacture||c. 1918|
|Front Scales||6" C, S|
|Back Scales||L, A (2 circles), ST(small angles). Edge scales: C, D|
|Scale Length||5.7” (14.5 cm)|
|Type of Rule||Disc|
|Area of Use||Generic|
|Comment||G. Small Co., Model No. 1.
Two-piece metal dials with C and D scales on edge and rotatable metal cursor with celluloid window.
Other scales on face of each dial. Dials rotate independently to align C and D scales.
Pat. Feb 12 1918 inscribed on reverse center hub.
|Donor||Collection of Dr. Paul J. Tarantolo Jr.|
(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.|