The apparently unofficial flag of Seattle from 1943 to 1963(?). The flag was known as the "Council’s Flag", and hung in the council chambers for at least two decades. The flag displays the former city seal, adopted on 13 January 1937.
https://www.crwflags.com/fotw/flags/us-wa-se.html#1943
Councilman Frank McCaffrey; SVG by Flagvisioner