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Rosen Foriagraph
ORTHOPTIC INSTRUMENTS
heterophoria test; foriagraph
Europe: United Kingdom
c.1930
metal

Foriagraph consisting of black metal battery-compartment handle, on-off switch, rectangular panel bearing white bakelite (?) chart on front. Two filter lenses (red and blue) in shiny white metal rims with handles.


1999.289

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thumbnail Rosen Foriagraph
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thumbnail Rosen Foriagraph
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