[44todd]

Hi All..
I recently bought some early auto parts from a guy and this was in the box
It looks like it would mount to a 1" vertical tube, It has a spring release on the latch that holds the arm up,the arm drops to 90 degrees,and there is a thumb tab to raise the arm back up.
All I can guess is its a vintage school bus stop signal??
ANYONE have any ideas???? Todd