A person from France, Alain, has contacted me, in hopes of ID-ing the wheels on his 1954 3104 pickup truck.

He wants to make sure the wheel/spare will mount correctly on the bed-side-spare tire mount.

It is a 6.50/16" tire.
My guess is that it will be OK, but:

A few photos are attached.
His wheel has 6 slots - I think the original 1954 16" wheel has 4 slots.

Here is an illustration from the 1954 Specifications Manual.
Attachments
Alain wheel 1 IMG_4019.jpg (162.38 KB, 145 downloads)
Alain wheel 2 IMG_4020.jpg (233.37 KB, 140 downloads)