A pair of strabismus diagnostic and exercise cards in black and white. The card to the left, 38, has the image of a crow standing up with a paper hat on his head and a feather on the hat, holding a drum stick in its beak, with flying birds in the background; the card to the right, 38a, has the image of a crow standing up with a paper hat on his head holding a drum stick in its beak and wearing a sword, with a partial image of another crow behind him playing a drum. Stereoskopische Bilder für schielende Kinder.
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Related Title(s):
Hidden treasure and Is part of: Stereoskopische Bilder für schielende Kinder.; See related catalog record: 52331180R