Humm. It's doesn't look quite right to me. But it also does not look like the usual secretarial signature either. Could be a rushed example. I would be skeptical of this one.
Stay far away from that seller.
He sells mostly forgeries.
He even sold a Rhett Butler (Clark Gable) over a year ago. For $150!!!!
I think he's a seller based in France.
I have just discovered that the seller CALVI-MARCE also sells with another alias LOTOGRAFSTAR. Help me to expose him, he takes advantage of the credulity of people. Yes he is based in France.
Here is another John Wayne he recently sold on ebay :