Full Details

Name and Model Number FUJI NO. 42
Country of Origin Japan
Date of Manufacture  
Front Scales DF [CF CI C] D
Back Scales S L T
Scale Length 10 cm
Type of Rule Slide Rule
Construction Plastic
Area of Use Generic
Comment FUJI produced at least six pocket slide rules with this quite unusual
scale length of 100mm. They were numbered: No. 41, No. 42, No. 401,
No. 401 R, No. 402 and No. 402R. The CF-DF scales are folded at square root of 10.
Rarity RR
Donor Photo from a collection in Belgium
Match Number 340
(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.