| Make |
Unique, England |
| Model |
Dualistic |
| Notes 1. This rule had split scales, that is 10" scales on a
5" rule. They also produced a 10" rule with 20" scales.
2. No instructions were provided with the rule but a 10" inch version of the same
rule is described in "Teach Yourself the Slide Rule" , Section 11, which has been scanned and is available
here. |
Front view
 |
Detail - left front view
 |
Detail -properties of metal tables on back of rule
 |
| Manufacturing date |
Estimated as 1950. |
| Length |
5" |
| Material |
Plastic on mahogony |
| Scales |
P1,D2 [C2,Q1,Q2,C1 ] D1, P2 |
| Gauge points |
p: 3.14: A,B,CI,C,D |
| Cursor |
Plastic with plastic frame top and bottom |
| Hair lines |
None |
| Documentation |
Good. Cardboard box also good. |
| Condition |
Complete in carboard box. |