I’m sorry, but I didn’t fare any better in finding a higher resolution picture other than what you’ve already shared.

The tone thing is definitely strange, though. I actually found yet another picture of it in a frame here… the painting itself is a lot more yellow than the previous two.

Edit: idk why, but the link isn’t working. But copy/pasting the below address does.

http://www.weimarberlin.com/2018/06/lotte-laserstein-german-painter-in-exile.html?m=1