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Here is a couple of pictures of a smooth style front drum - service/NOS replacement part. They are dated from 68 so that might indicate that the supplier for the service parts was possibly one of the suppliers of one of the car assembly plants
I got a drum just like these and one thing I noticed is the wall thickness of the hub on the outside edge is larger than the first ones I have pictured by at least 1/16 inch if not 1/8. It's noticeable when you compare these pictures with mine.
Possibly different supplier. Can't see the markers mark or name on the ones I posted. Hard to make out. Think almost always they will have FoMoCo or Ford cast in the drum and have seen KH on many. On the second picture below the casting is sort of covered by the watermark.