Instructions
Look at the paint on the tray. Older paint is slightly dull. The color may look the same as a new one at first but newer trays or reproductions will have much brighter paint.
Examine the tray for flaked paint or tiny rust spots. A tray that looks perfect but is supposed to be old may be a reproduction.
Check the tray for written information, such as a date, the name of the tray, the manufacturer or the year. Some reproduction manufacturers will not acknowledge that their items are reproductions, which can be misleading.
Check the back of the tray for any other manufacturers name or mark. Some items may state that they are licensed by Coca-Cola or that they are copies of an earlier tray.