Abstract Expressionist Painting - Illegible Signature?

Discovered this well-framed, vintage modern abstract expressionist painting at a local charity shop; it is clearly titled "Images" and signed but the signature is illegible, at least for me. the back of the frame is date stamped 1990 which means the painting pre-dates perhaps by a number of years. I'm reluctant to remove from the frame seeking additional information which might identify the artist. I usually take pleasure in these puzzles but this one has me stumped so hoping a viewer might recognize or be able to make out the signature. Thanks in advance!