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Old 11th Jul 2018, 10:14 am   #2
G6Tanuki
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Join Date: Apr 2012
Location: Wiltshire, UK.
Posts: 13,953
Default Re: Mystery wooden box? Help identifying please

The valves look like "Hivac" midgets, which were produced in the late-1930s.

See http://g3ynh.info/valves/old/Data-Bo...vac/index.html
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