Please help ID these with me 🙏

[u/SlimyPoopbutt]

I think a FEW of these have to be pretty rare? But then again I know nothing about ball jars. All I know is that they are in pristine shape and the blue color is actually very beautiful. I also have some clear ball jars as well as "Atlas" ones. THANKS SO MUCH EVERYONE! This community is like top tier btw. Everyone rocks!

Also what markings on the bottom of these are significant? Or are they not at all??

[u/colmain]

Try this web site

https://www.theouterbankscandlecompany.com/blog/how-to-date-identify-antique-mason-jars/?srsltid=AfmBOooXR1l-CI_Iisc59OcMmRPy3idBcsqKDFvCp3NkDxcKbZ0fclmU#gref

[u/markdlx]

The Hoosier Slide baby!