The odometer looks like Stewart Warner, and the windows in the multi-function gauge look familiar too. Are there any numbers stamped in paint on the back of the speedo?
50s chevy is my guess - I've never owned one but most of my buddies loved 'em, so I've sat in a few. dj
My first look said ,PONTIAC. I think it was the three vertical lines on the gauge face. .......... Jack