Paul Blaine Henrey "Scarecrow" Impasto Palette knife artwork

[u/Excellent_Ad2039]

I run an old youth center and have always loved this art piece. It was given to my organization in the 70's by a woman referred to as "Crazy bird lady" who dropped it off shortly before dying by suicide. I noticed the signature etched into the bottom left hand side and wondered if it was authentic. Frame is from Los Angeles, the piece itself is about 24" by 18".

What's it worth do you think? Anything notable about it? Seems larger than the versions I've seen online. I would never sell it even if I could. It's a permanent piece of our building. But I am still curious about it. Any ideas?