Can't put an exact time frame on age, but the one your showing that has the etched product name are newer.
The ones that have the stamped name are the older ones. I had about 150 of the stamped ones, black and polished, that I sold here and E-bay last year or so. $30 and $45 New in undamaged boxes with original tissues.
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Vietnam 1969-1971
Last edited by ben_g1; 01-18-2017 at 12:26 AM.
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