Help identifying brand
I found this article about a slightly different bike:

This bike was manufactured by Cleveland Welding (CWC) for distribution
and sale by the Seiberling Rubber Company. It is essentially a
standard issue CWC bike using the second series post-war CWC 3-Gill
pattern frame and the serial number places the build date in 1947,
probably near the middle of that year. While the basic bike is common,
the Seiberling badging is one of the less common badges that were used
on these bikes.

Note that there is actually a Facebook group for these bicycles: &quot;Cleveland Welding Company bicycle owners&quot;.  One post I find on the group suggests that the serial number is from 1945.