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lens baton no. 131.
OPHTHALMIC LENSES
lens set
wood; glass; card
1999.3322
OPHTHALMIC LENSES
lens set
wood; glass; card
Wooden baton consisting of a handle and frame holding a card. The card features lenses stuck so as to be viewed through holes from the other side. Five square lenses. Blue. Lenses: Gap, gap, gap, un-numbered (all covered by paper graph marked "BLUE A", "BLUE B", "BLUE C", "BLUE D"). 213B, 213C, 213D, 213 E.
1999.3322