I based my initial assessment on many years of collecting, and in a large part on "instinct" learned after looking at and handling military patches, while I am not in the league of some of you or those on the USMF. I still say the graphic and design of this patch does not fall within the norm for wartime naval squadron patches (usn and usmc). While it now is a fact that it came from the veterans estate, we cant for certain determine the "chain of custody" of this patch, when was it purchased, worn, etc. While this may seem like over the top, consider the number of members of a squadron and the sheer attrition of such an insignia, this could be among the rare navy squadron patches, or as I originally stated a postwar/reunion patch, it could also be a px purchased patch. We now know that there are three of these patches in existence, but we do not yet have a photo of one being worn. A very interesting insignia, conversation and an outstanding grouping, great find and kudos to you for purchasing the group.
I am sure we have all experienced the veteran who insists that something was issued to them in WW2, korea, etc when we know it is not possible or something is obviously a postwar or civilian item. On the other side of the coin, I have also experienced a veteran coming up with something that no one has ever seen or heard of, but the provenance is unmistakable.