Can anyone ID this bathroom faucet?

It's probably around 30 years old and has seen better days. The other faucets in the house are by Moen, but there are no markings on this one.

I'm assuming this one has a cartridge too, but the little rod is moved forward and backwards to turn it on and off, so I'm wondering how a cartridge would be replaced in this case. Looks like the collar unscrews at the bottom. Hoping someone has experience with this thing. Thanks