Search for any code printed or stamped somewhere in the frame; US made speakers used what´s known as "EIA codes" which identify manufacturers and sometimes date of construction.
Sometimes there´s some code stamped or even handwritten on paper cone itself.
Sometimes there´s some code stamped or even handwritten on paper cone itself.
An externally hosted image should be here but it was not working when we last tested it.
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I'd be thinking Japan makers. Coax possibly. It almost but not quite looks like an old Pioneer PAX series. Its kinda an odd duck with the 5 strut cage.
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