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Username TL8W
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Joined Feb 18, 2019
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12/18/13 at 18:52Interesting! Sept 1965! It could also just be Sept 1970, but the latter would have only been possible if the factory produced this type of lamp/cap alongside the flush, crimped cap they had introduced in 1969. Possibly an earlier batch of tubes found their way into the etching plant "late". The discrepancy would be cleared up if there was another dot to the left of the group containing the dash, that would make it Sept 69, a much more likely date for this etch.