Full Details

Name and Model Number Japanese Artillery
Slide Rule
Country of Origin Japan
Date of Manufacture c.1930 - 40
Front Scales Translated, distance [ distance 1/6-map-scale 1/6400-map-scale ] distance
Back Scales [ Sin Sin ], beveled Edge Scale 0 to 28 cm, Lower edge scale 0 to 140-equal-parts
Scale Length 25 cm
Type of Rule Slide Rule
Construction Heavy brass; 28-cm x 3.4-cm Scales engraved. Missing cursor.
Area of Use Military
Comment One piece closed frame. Identical examples are in the collections of the Power House Museum (PHM), Sydney Australia (dated 1920 - 29) and in the Smithsonian National Museum of American History (NMAH), Washington, DC (found in an artillery dump in Japan in Oct., 1945). Scale markings are in simple Kanji. There are no maker's marks. Translations are from NMAH, scale descriptions from PHM. This example is missing a brass framed glass cursor.
Rarity RRR
Donor Collection of Ed Chamberlain
Match Number 180
(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.