Technical Brake Drum ID?

Can these drums be id'd from this picture? I believe they might '46-'48 drums but I cant remove a wheel currently to get a better look.

Ive looked at a bunch of OE drums online and the '46-'48 drums are the only potential match I've found with the ribs around the perimeter.

 

Looks more like '35 Ford drums to me.

Dave

 

It occurred to me some context might matter. This is my '32 Tudor and it has been converted to juice brakes sometime prior to my ownership.

 

Yes I think 46-48 based on that picture.