No 124 leather is red. If you look at Packard sales literature, red was optional with all paint colors. Packard was in the business of selling cars, not making rules. Jr leather was different than Sr leather also.
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I think it probably had a seal that was glued on. I think they used 3 different methods - the continuous channel, the clips and glued on. What parts are you still missing?
Is there a channel that holds the seal on your car? Some of the cars have channels that run the length of the door edges. Other cars have the holes for the clips.