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A Reference Site for UK Mechanical Industrial Time Recorders |
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International Time Recording Company
Documents |
Here are some downloadable and printable PDF documents from the IBM History website:
ITR Data Sheet:  |
ITR Instruction Leaflet: |
ITR Instruction Leaflet 2: |
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ITR Service Sheet: |
IBM History |
ITR Serial Numbers: |
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IBM Clock Models |
ITR Dial |
An ITR Product Photograph from 1914 |
An IBM Product Leaflet from 1920 |
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Documents |