Full Details

Name and Model Number Molter Slide Rule 8406
Type 3, Late Variant
Country of Origin Germany
Date of Manufacture c. mid 1920s
Front Scales A C [ D ]
Back Scales n1 n3 tg sin log
Scale Length 13.4 cm
Type of Rule Watch Type
Construction Metal housing with scale discs sandwiched between two movable celluloid discs with inscribed cursors. Inner D scale on front is rotated by center knurled control knob.
Area of Use Generic
Comment Late variant distinguished by slotted center knob and clear cursor grips..
Rarity RR
Donor Collection of Dr. Paul J. Tarantolo Jr.
Match Number 212
(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.