These mugs are awesome, and that's almost all I can say for certain about them. They are unmarked and I've been unable to find out anything about their origin. I think it's a pretty safe bet to say that, judging from the bold mod graphics, they were manufactured sometime in the 70s. Each measures 3 1/2" wide x 3 1/2" tall. Two have minor stains from coffee or tea in the bottoms, and one has a brown stain on the bottom - these are possibly just surface stains that could be cleaned. There are no chips, cracks, or scratches, and only when closely examined can you detect a couple of nicks in the graphics. This a great set for use, display, or collection!
Browse through more of my vintage finds here: http://www.etsy.com/shop/TeaAndLaundry?section_id=6677352
I will happily combine shipping with other items from my shop - due to the mixed nature of items for sale, you may be overcharged by default. If this happens I will issue a revised invoice or refund overpayment!