Full Details

Name and Model Number Diwa 710 Teknilog
Country of Origin Denmark
Date of Manufacture 1972
Front Scales LL00, ST, T, DF [CF, CIF, CI, C] D, P, S, LLO
Back Scales LL01, LL02, LL03, A [B, L, K, C] D, LL3, LL2, LL1
Scale Length 25 cm
Type of Rule Slide Rule
Construction Plastic
Area of Use Generic
Comment This rule was rejected by professors in Danish engineering schools as it required
too much classroom time to teach methods of handling trig functions on the stator.
They preferred slide-based trig functions. As a result, Diwa did not introduce the
710 and produced the 720 Polylog rule instead, which moved the trig scales from the
stator to the slide.
Rarity RRR
Donor Collection of Marion Moon, California
Match Number 300
(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.