A pair of strabismus diagnostic and exercise cards in black and white. The card to the left, 53, has the image of a crowing rooster in front of a fence, which has a spider web on the top left corner; the card to the right, 53a, shows image of a crowing rooster in front of a fence with a chick following him. Stereoskopische Bilder für schielende Kinder.
Copyright:
This item may be under copyright protection. Please ask copyright owner for permission before publishing.
Related Title(s):
Hidden treasure and Is part of: Stereoskopische Bilder für schielende Kinder.; See related catalog record: 52331180R