Vintage Skeletons Diagram with Numbered Bones Coffee Mug Set

Vintage darkly humorous black and white image of a skeleton couple on a coffee mug set, one skeleton per cup, one facing front, the other facing back, seemingly reaching out to each other and looking into each other's eyes. Each anatomically correct skeleton is diagrammed with numbered bones, at one time possibly used in a science laboratory of old, or a classroom receiving a lesson in the human skeletal system. This set of mugs is designed so that they fit together. So romantic, the set could be a present for Valentine's Day, or a gag gift for a couple you know who love darkly humorous Halloween images.