1. This is a very compact rule. Other British manufacturers fitted a similar range of scales on a simplex body which meant the rule was much larger than this one.
K, L, DF [CF, CIF, C] D, LL2, LL3
| Slide rules HOME page | COLLECTION | 10" RULES | UNITED KINGDOM |
| Make | Blundell, United Kingdom |
| Model | Duplex 904 |
| Notes 1. This is a very compact rule. Other British manufacturers fitted a similar range of scales on a simplex body which meant the rule was much larger than this one. |
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| Front view |
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| Detail - front left |
Detail - front right |
| Back view |
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| Detail - back left |
Detail - back right |
| Manufacturing date | c 1975 |
| Length | 10", Duplex |
| Material | Plastic |
| Scales | ST, A [B, CI, C] D, S, T K, L, DF [CF, CIF, C] D, LL2, LL3 |
| Cursor | Plastic - single hair line. |
| Documentation | Complete, in the form of thin booklet which could fit into the slide rule folder. |
| Condition | Good. |