Ok, so my understanding comes from the 1942 ACC Supplement and the 1946 ACC, where might yours come from?
Quote:
Originally Posted by tedzan
Leon
My understanding of Jefferson Burdick's established formula for T206's is that which comprises of white-bordered, brown captioned, cards with ATC advertisements
that were printed and issued within the timeline 1909 to early 1911 ?
TED Z
T206 Reference
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