No markings on this anywhere that I can find to indicate age or manufacturer. Is a combination of metal and plastic construction and everything is in working order. I did not test its accuracy but it uses what looks like a standard clock work so would be easy enough to replace if critical to you.

I don't think this would be great for keeping appointments by.  When the fluorescent back-light and revolving wheel is turned on, the clock is more mesmerizing than you can imagine.

You may not be able to avert your eyes.

The color wheel causes a spiraling effect where the colors continually swirl to the center of the dial.  I may have to find an easy way to append a little video of it as it is wild.

The outside edge of the plastic hexagon frame measures approximately 15" across.  The clock itself has a true glass face which should give some indication of its age.  My guess would be mid 70's but that is truly just a guess.

I doubt you'd find anything similar to this for years if ever.