7" 1939 style Hubcap Real or Fake?

[rfkimba]

Hi Guys,
I was offered the hubcap below . It lacks a white porcelain reverse. Greg's tutorial on fake Bell  hubcaps indicates this should be a fake. However the Bell logo looks perfectly  correct and there is a #22 present on the reverse. Could this be an exception?
Please advise with your thoughts.
Regards,
Bob Farber

[Sargeguy]

These are covered in the 1939 section. 

http://www.classicrotaryphones.com/forum/index.php?topic=11683.0

Not sure why there are two different color backs.  Probably different manufacturers. 

[rfkimba]

Greg
I did miss that point about dark blue.
Thanks,
Bob