| 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 |
| Thumbnail (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. |