See http://gwulo.com/node/31911 for more information.
We found a similar item in one of the AA sites. The manufacturer of this creramic insulator is NGK; and to our amazement, the company is still existed nowadays and is named NGK Insulators, Ltd.
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NGK Japan Ceramic Insulator 1974
We found a similar item in one of the AA sites. The manufacturer of this creramic insulator is NGK; and to our amazement, the company is still existed nowadays and is named NGK Insulators, Ltd.