Category:Telegraph keys in the National Electronics Museum
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Media in category "Telegraph keys in the National Electronics Museum"
The following 4 files are in this category, out of 4 total.
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Telegraph key display - National Electronics Museum - DSC00215.JPG 4,210 × 3,416; 5.11 MB
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Telegraph key, unidentified - National Electronics Museum - DSC00223.JPG 4,353 × 2,979; 6.44 MB
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Telegraph key, Vibroplex, Horace G. Martin - National Electronics Museum - DSC00221.JPG 4,817 × 2,179; 6.03 MB