The odd one is the one piece one where you can't pull the drum off of the hub. These are what's on my 69. I think there was a thread way, way back, sometime before the board was redone that described some people having these one piece and some having the 2 piece drum/hub combos. Could be they were a stock replacement some parts store offered. I'll be pulling mine sometime in the next week to replace the brake cylinders. I'll check for any numbers stamped on them anywhere.
