1H1608 and 1HA1608 Commerce  or Commerce Clock

Styled for offices, schools or professional use.  8-inch dial in brown or gray.

They did come in gray but only this 8-inch model.  The photo above shows ivory but I'm pretty sure that's paint.  It's the only pic I could find (also it's the 1HA1608).  Most of these came in brown but you could also get simulated chrome.