Yes, and they were also offered later on, on the back of Softail FXSTC's for awhile, and the same wheel was still available in the H-D P&A catalogs way into the late '90's. There are a lot of those spun 16" wheels out there.I'm pretty sure Harley made a 16" solid wheel with rivets, more like a Centerline than a Cragar. If it's 16", it's probably a Harley wheel. If it's 15", it's probably some sort of frontrunner style drag wheel.
BTW, most of the folks that ran 15" wheels in the 70's ran car radials on them.