Portrait of Baertje Martens by Rembrandt.
This version is overexposed and too bright compared to the original (my fault), but this does give us a slight hint of sloppy work by Rembrandt. When you look closely at the top of the head, you can see that the headdress was originally painted a lot bigger and Rembrandt trimmed it down by making strokes around it. Especially on the big version I have open in photoshop at the moment you can see that the stroke and color tone slightly differs from the rest of the background.