Jerry:
Well, I guess I didn't answer your questions on the datastring. The preliminary datastring 397.37.16.9 was the 397th submission in 1937 and both tubes had a diameter of 16.9 mm. I'm not sure on the 1272.9291/37 unless it was some intermediate pass. And the final pass is the 3336.37 all with the 37 denoting the year and the house number is to prevent the proofhouse from knowing who is submitting, which might create a bias.

Kind Regards,

Raimey
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