| Name | Keuffel & Esser 4092 Log Log Duplex |
| Front Scales | A = B S C = D |
| Back Scales | LL1 LL2 LL3 = C T CI = D L |
| Type of Rule | |
| Material | Engine divided celluloid laminated mahogany, with exposed mahogany edges |
| Dimension (mm) | |
| Area of Use | |
| Origin of Rule | Michael O'Leary |
| Match Number | 4325 |
| Comment | |
| Thumbnail | No Picture |