I know there are so many different people and regions, plus historians and researchers. I tried this on an antique site. Nope. I ask a guy that is very smart and runs a local antique shop? Some ideas, but nothing solid.

I see a model T in the background. Windy day. The uniforms, shoes, the hats and aprons are unusual.

I think it's SHS or HHS 1919 in leaves, I made this shot from a glass negative that's about 5x6, and the guess could be something else?

Does anyone see something I missed? I can add that this could have been WW I, a health fair, or something else. If it's a graduation, what are the outfits? It was in an auction lot that had three smaller glass negatives from Scio, Ohio. I contacted that history group, local and they said, "It's nothing in Scio". Distant guess, maybe somewhere in Ohio? Large building, doesn't look like a rural location.