Brake Drum Variations

[RobR'35]

Looking through all my info I don't see much on all the variations/styles of brake drums from '32-'48. Hubs too would be cool.
Front vs back throughout all the years.
Is there some place I could look? Has anyone taken pics of all the style changes and put them in one place?
Rob.

 

[Kurt in NJ]

Have you ever read the service bulletins??, most of the changes through the years are pictured in there

 

[RobR'35]

I'll look thanks.