This thrift store find turned out to be unexpectedly hard to identify. I'm posting this here in case someone who is more familiar with doll brands has any idea who this is, or knows someone who might. Any help would be much appreciated!
At first I thought it was a Steffi Love. The body looks exactly like an older articulated Steffi body (like this one), except for the torso which is much less hourglass-shaped. Grandma doll? Her face looks older too. Neck stamp says Simba, not Simba Toys, and there's no logo, but the body seems pretty good quality for a clone.