Hmmm...I would say that they are incorrect.
I own one, and have owned another gold Genève, and own quite a few in steel. All are from the early period, like yours, and none have flat hands.
In terms of NOS, I wouldn't know, though it is possible that there are some out there.
Can you post any other photos of the case and/or movement? I ask because I may have some further thoughts...
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