Yes, they are, otherwise known as Firestone RH-5's. The 2" wide flat strip near the middle is a "dead" giveaway. The problem with these rims is the extremely narrow locking lip that holds the two halves of the rim together. It's notorious for getting rusty, or being damaged during assembly, and blowing apart when the tube is pressurized. If a wheel has been assembled and run for a while, it's probably fairly safe, but few, if any tire shops will work on them. I believe there's a DOT regulation prohibiting them from being used on commercial vehicles, at least.
Jerry
