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| Lot 225 | Very interesting mahogany box containing a set of reference standard coloured signal aspect glasses provided by Chance Bros & Company. The box labelled 'SUB-STANDARDS OF COLOURED GLASSES FOR RAILWAY SIGNALS' and inside marked 'Sub-Committee On Standardisation of Signalling:' Dated 9 October 1925. |
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| Lot Sold For: £25 | ||