Full Details

Name and Model Number Japanese Artillery Slide Rule
For T-99 Gun
Country of Origin Japan
Date of Manufacture 1940 to 1945
Front Scales Distance, Height, Deflection, seconds
Back Scales Instructions (see translation)
Scale Length  
Type of Rule Slide Rule
Construction Aluminum
Area of Use Military
Comment This unusual slide rule was manufactured during WWII. It was used for a T-99 anti-aircraft gun manufactured under license from Krupps in Germany. See translation for details.
Rarity RRRR
Donor Collection of John Hunt snr (in UK)
Match Number 389
(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.