You can't help but be happy drinking from these vintage Metlox Colorstax Fern Green Coffee Mugs. The color is fantastic!!. These were produced in California in the 1980's. Condition is pre owned and used, but there are no chips, cracks or repairs. There are 3 mugs that have 2 long vertical lines of stained crazing on the interior (see last 2 photos) One of these mugs also has 2 horizontal lines of non stained crazing on the interior that I could not get to show ...in a photo. The 4th mug shows signs that interior crazing may have started. This crazing is hard to see without bright light or magnification. I see no crazing on the exterior. I was told by a long time collector that this is a common issue with this pattern. I also have (5) 7-3/4" salad/snack plates listed, take a look. Please contact if additional information or photos are needed. Shipped with USPS Priority Mail.