The Stovebolt Site Forums The Shop Area Driveline NOS, 2 piece Torque Tube Oil seal Mystery

NOS 51 52 53 54 CHEVY PASS 150 210 BELAIR TRUCK TORQUE TUBE OIL SEAL GMC 369473

The above eBay auction is for two NOS torque tube seals. Part number on package says I-3694736. There are 2 sets available.
One seal is rubber or neoprene and the other seal uses leather.
According to the seller the item is one set of a 2 piece oil tube torque seal.
I'm assuming both seals came from the same package.
I have never seen a 2 piece torque tube seal.
This illustration group number 5.469 shows one seal.
MPC Group # 5.469 parts page

This Auction is for part number 3694736.
Which has only one rubber oil seal.

Did GM have a two piece torque tube seal?
Or did they put two types in a package for you to choose?

I think the second auction is correct with the one-piece and the correct part number (and, a better price).

Chevrolet often packaged more then one item in a single package.
There is only one seal used in this case.