Can someone help I.D. this side veiw mirror?

thanx in advance - a little garage sale find for $2 (he wanted $3 but i talked him down):

says "Roberk" in scrpt

 

Western Auto, Pep Boys, etc ...

 

thanx - i guess i am a little surprized - for it looks pretty old the arm appears to be cast/pot metal


when i think of Pep Boys etc i think of "newer" items -

 

pep boys has been around a long time

http://en.wikipedia.org/wiki/Pep_Boys