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Old 5th Oct 2018, 12:07 pm   #26
G8HQP Dave
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Join Date: Sep 2008
Location: Solihull, West Midlands, UK.
Posts: 4,872
Default Re: Has anyone seen a valve like this before?

I was just about to say that acorn-like valves soon became available on B7G base. Presumably these were more robust, both in use and during replacement.
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