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 Post subject: Signal light with a F on the lens
PostPosted: Mon Oct 30, 2023 6:04 pm 

Joined: Sun Aug 22, 2004 6:10 pm
Posts: 222
I recently acquired an Adlake 1142 electric signal light. That model appears to have been
designed to be used in semaphores replacing oil lamps. Mine had a different use, it has a lens with an F on it. The only use I can find for an F is to signal that a rockslide detector has tripped. Have any of you heard of any other uses for such a signal?

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