I have one with a 634,000s serail that came in an early, one piece hinged box. It has just the .22-38 stamp in blue ink. A later one, 638,500 range is in the same maroon box, but the paste in instructions are 22 specific. In the past we've had threads that speculate the red picture box didn't appear until about 640,000. I don't have ship dates on my guns. But others worry about it, so you can probably get someone to chime in on the dates.

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Dick Burg