Hand Painted Vase with Strange Maker's Mark

I purchased this vase back in the 70's from a yard sale table years ago for my mom. Someone had painted it with orange and black paint. My mom stripped the paint and was elated to find this beautiful blue with earth tones that matched her 'blue' living room. Many years later after my mom passed, I reclaimed the vase. She, nor I could never identify this maker's mark. Can you? Thanks.