Most members here will not often venture a guess on value, as there are just way too many variables involved. What they will do is suggest places and links where you can research and come up with your own estimated value if it is thought to be someone known. Best of luck!!! You are also showing two images, and neither signature is clear, BUT, neither signature is a close-up where we might get a better look either.....you might want to try that.......we MIGHT be able to figure out one or the other then.......
The one that is not a portrait is too blurry for me to make heads or tails of... better pictures of both full image and sig, might help with identification. My current leaning is !00% with @Any Jewelry .
@winas, @Any Jewelry, @Jivvy, The VERY 1st image, the best I can come up with on the signature is "AIEPFES" with a line under it.........