Early Christmas present

Wow! Can you ask him if he has a source?
As to timeline, I am guessing, but would say yes. "Sure" I used them back then.
 
They make them to this day. Smaller services (and the military) for that matter still buy them enough it seems. Hudson RCI name identifies it as newer. Earlier ones just say Hudson. Harder to nail down dates more than that. I believe on the back you'll see a copyright date on the instructions.
 
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