Here a photo that Denny posted a while ago.
http://rides.webshots.com/photo/2395785850098611668qDSomp

Here are photos of one of the bottom sides on my 54
http://1954advance-design.com/Photos/Reassembly/21_54DoorSeal.jpg
http://1954advance-design.com/Photos/Reassembly/20_54DoorSeal2.jpg

The single piece of seal is joined under the middle of the retainer on the bottom (I think- I am not now near my trucks or near a Factory Assembly Manual).