MCM Wind Key Guitar Wall Clock

Very unique MCM key wind guitar wall clock in good working condition. Have not found another online, nor any manufacturer or designer info other than the W-240 marking on the back. Someone suggested it might even be a custom piece. Best description other than pics is that it’s about 34" tall and 14" across the clock face. It’s been cleaned and polished (the glass front is clear and the gold metal outer band shines up really nice), the wood top piece has a nice patina, and the clock has been tested, oiled, and has a new key. Asking $300 obo based on uniqueness, unknown time period, and overall condition. Open to reasonable offers. Thx for looking.