This painting appears to be acrylic and measures 45 inches tall by 34 inches wide with the frame. The painting is on board.
This came from an estate sale three years ago in Los Angeles with lots of vintage art.
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I've done an exhaustive search of the artist databases and have not been able to find a match to any artist with the name LEE - first or last - but have valued this on the basis of its size, medium and subject matter compared to other unattributed works of art being offered at auction at this time.
Based on the photos and information provided, and subject to examination, this is"
International School, 20th Century
Abstract Landscape, probably mid 20th Century
oil or acrylic on board
45 by 34 inches, framed
signed lower left
PROVENANCE: acquired at a Los Angeles area estate sale approximately 3 years ago
*represents a fair-market value for auction purposes; retail or asking price may vary.