It's actually for car headlights that are no longer available. To replace
the internal reflector assemblies with modern ones, as the originals are
plated plastic which fails. But the glass outer cover has a fresnel lens
built in which the modern reflectors don't need. So would it be
economically possible to have copies made of the toughened glass outer but
in plain glass? Or perhaps some other material?

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*Where do forest rangers go to "get away from it all?"

Dave Plowman London SW
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