A pair of strabismus diagnostic and exercise cards in black and white. The card to the left, 41, has the profile of a woman wearing a pearl necklace and black clothes, about to eat a piece of candy; the card to the right, 41a, has the profile of woman wearing a ring, a pearl earring, and white clothes, about to eat a piece of candy. 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