That is MY kind of fun stuff ! I have a similar sign, painted county road sign
from the 30's (?) that is in the shape of an arrow, pointing the way to "Rosalia"
(a small town about 20 miles south of me), with the number "10", indicating is
was ten miles in the direction the arrow pointed. It is weathered pretty deeply,
but the extra layer of paint that were the letters caused the background to weather
more deeply, leaving raised letters. Not sure I am brave enough to try and put
paint to it again to try and "restore" it. Nice find !
"Duty above all else except Honor"