Yesterday I came across this 0.5 restored copy of Flash # 1 due in an upcoming CC auction - it's noted as Wrong back cover, which got me thinking 'That looks like the correct full colour back cover to me...hmm'...so I looked up past sales on HA, and found a 6.5 unrestored copy with a back cover that has a mostly green illustration. That explains it then, I thought, unitl I found a 4.5 unrestored copy with a back cover that has a full colour illustration. Upon closer inspection, it can be seen that the line of text 'RECORDS PLAY 3 FULL MINUTES FOR BOTH SIDES' is on both of the unrestored back covers, about 3/4 of the way down, but not on the 0.5 copy. This leads me to think that the 'Wrong back cover' may be from an Action Comics # 21, and, not unsurprisingly, that the Flash # 1 back covers never appeared on any other book.
But, as I am no expert on the history of GA books, does any of our more learned colleagues know if there was indeed a second printing of Flash Comics # 1 ?