File:NCC block.jpg
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Summary[edit]
This is a photograph of a Tyer's 3-position one-wire absolute block instrument in Carrickfergus signal cabin. The photograph was taken by E.N. Calvert-Harrison.
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File history
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 08:25, 5 June 2007 | | 594 × 598 (40 KB) | Geologue (talk | contribs) | This is a photograph of a Tyer's 3-position block instrument in Carrickfergus signal cabin. The photograph was taken by E.N. Calvert-Harrison. |
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