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| Item# | Type | Model No. | Match No. | Variant No. | Model Name | Maker | Country | Production or Serial No. | Material | Scale Length | Date | Condition |
| KEU483 | Linear | n/a | n/a | n/a | Nordel Sewage Rule | Keuffel & Esser | USA | None | Boxwood w/printed scales | "10" | 1928 | C5 |
Notes: Closed frame version of the Nordell Sewer Slide Rule. It has the exact same scales as the front side of the 4128 Nordell Sewer Slide Rule - Duplex Type. It is not found in any catalogs and was probably specially made for Link-Belt (based on the advertisement on the rear side of frame and the accompanying instruction sheet.
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