Post #784299 by TabooDan on Sat, Feb 24, 2018 1:53 PM

Aloha!
I'd say the mug on the right with the even and straight font and in the middle of the base is the older one.

The remnants of the old small foil label from the manufacturer, OMC, is also a good sign. This label was on most of their items that were manufactured in the company's early days and can be seen on many Tiki Mugs from the same era. I think the company started around 1961 but not 100% on that.

Hope this helps a little.
TabooDan