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23-04-24, 05:12 PM
Another point Gary is that although the key is marked 'patent' nothing has been found in the British patent abridgements, so maybe its one that was...
2 replies | 40 view(s)
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23-04-24, 04:56 PM
very unusual thing, wonder if the spelling Detecter rather than Detector gives any clues, Chubb always seemed to use Detector on the ones I have seen
2 replies | 40 view(s)