He's got a crazy collection and an awesome guy. Bought plenty from his catalog over the years. FYI to Hayes newcomers...don't mention politics on the phone if you don't want an earful🤣. He definitely will have a thought or two, and you best have VERY thick skin. Man I wish I could get up to Montana to visit!

Not a 20s-30s on, so perhaps Occupation of Japan, lets see what others say.

Maybe because Alameda used to be a "Navy Town."

Here is a #6 and a couple 7s that sold on eBay in the past few years.   There are more than 3 people trying to sell flags for over $2K no size 7 has sold for that much in 3 years.  The prices shown are actually sold prices from the past 3 years.  

Very much outside my wheelhouse, have had it for a while but plan on moving it along. All wool bunting made by Annin, is about 2 1/2 by 4 feet and has visible stains on the grommets. Has many small holes.   

Now this is the kind of cool, and unusual stuff, we here get to learn about on this forum and not many other places.  I will be following along, I have NO idea on this, to see what may be found out about this interesting item.  Such a great place to be able to come together and get ideas/pointers/knowledge from others to learn about all of the usual, not so usual, and downright obscure items that are still out there from out military past.

circa 1920-1930

There a several of these Size 7 flags for sale on ebay right now. 1 of them.. the seller is asking almost 3K for it. The other one.. the seller is asking $348 or best offer. Size 7 Ensign. Same flag... the expensive one claims to have come from a named ship. My post above... I was just adding info..... As others have said though, AI can lead a person down all manner of rabbit holes. And like manayunkman pointed out, ai keeps pointing to info gleaned from the forum. Its a nice flag. Being exceedingly rare?  Check ebay.

Is it real WWII patch? Thank you for looking

Nice find. I wonder why it would have US Navy for a civilian school team?    Thanks for the help.