| Name and Model Number | Aristo 10065 System Gruter |
| Country of Origin | Germany |
| Date of Manufacture | ~1951 |
| Front Scales | T, ST, DF [5 scale multi-precision, C] D, ST, S |
| Back Scales | K, A [B, 5 scale multi-precision] D, L |
| Scale Length | 25 cm |
| Type of Rule | Slide Rule |
| Construction | Plastic |
| Area of Use | Topography |
| Comment | The main slide contains precision scales.
The "Log log" slide has the following scales: front [CF, LL3, Ll2, Ll1, C] back [B, LL01, LL02, LL03, C] The "Topographical" slide has the following scales: front [B, sin * cos, cos^2, E-R, C] back [CF, T, 2 special, C] The "Circular" slide has the following scales: front [ tan a/2 in 3 scales, (p * a/180) in 3 scales] back [ tan a/2 * tan a/4 in 4 scales] |
| Rarity | RR |
| Donor | Collection of Rod Lovett |
| Match Number | 6 |
| Thumbnail |  |
| RR | = Rare -- 1 of 25 collectors has one; it may take a year to find an example in the marketplace. |
| RRR | = Very rare -- only very few known to collectors; may take several years before one comes up for sale. |
| RRRR | = Extremely rare -- a museum piece; unlikely that an example will ever come up for sale. |