This is a General Tire Advertising Tire Ashtray. The printing on the ash tray is readable but is worn in places as you can see in the photos, but it is still very readable. On the side of the glass tray their looks to be a crack in glass, but the crack is directly across from each other, and cannot be felt if you run your finger across it.  It does not bother the glass tray as lt is in one solid piece.  I was told it could be how the glass was made, but I want to be sure that you know this is there and can be seen, but again you cannot feel the crack with your finger. Tray measures about 6 inches across and about 1 1/2 inches tall.