Mays’ wife had a very distinct way of signing Willie’s name and is easily recognizable. I wish Mays signed his name as well as his wife did honestly
Here is an ebay item with the wife version of his autograph. She signed most of his fan mail from the mid to late 1970’s from what I have seen so if you got a Mays through the mail it was probably her version.
https://www.ebay.com/itm/225378248403