This is a unique and gorgeous piece that I have been reluctant to let go. It is a huge metal on wood block print - and was possibly used in poster-size advertising. But it also perfect to hang as an art piece, as its patina is excellent and the image - that of a cold lemonade-type drink with two straws and possibly mint leaves- is adorable and detailed.  The dimensions are 11" by 21" - and the wood backing is
almost 1" thick. There are interesting markings on the metal (in photos above) that may indicate its maker. If anybody has more information about the provenance of this wonderful piece, I would appreciate it.