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AR3a: Certain dating of early 12" ceramic woofer

Giorgio AR

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Looking today in my photographic archive I found some photos of an early 12" ceramic woofer of AR3a, this has the rubber" ring "on the cone like the previous woofers with Alnico magnet, looking carefully at the photos, luckily on the back of the magnet appears the stamp with the date!

I own 2 early woofers with the three-recessed ceramic magnet (without the "ring"), but only one of them have  dating stamped!

1)Dated: FEB 5 1970


2) Undated (this and the next are my woofers)


3) Dated MAR 11 1971, in original condition in the photo, now currently refoamated, like the previous undated one!



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