Michel Dumas (XX-XXI) (Attr.) a table clock, tinted lucite or plexiglass, circa 1970. Tinted and pleated lucite or acrylic plexiglass. Attributed to Michel Dumas. (13 x 36 x 13 cm) Condition: We do not guarantee the working condition of the clocks and/or watches, and they have not been tested. For long-term accuracy, we recommend a full overhaul by a professional watchmaker. Condition: We do not guarantee the working condition of the clocks and/or watches, and they have not been tested. For long-term accuracy, we recommend a full overhaul by a professional watchmaker.