MusEYEum Online Catalogue

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lens measure / "Federal" Lens Gauge & case
lens measure
Dioptremeter Co
North America: USA, Rhode Island, Providence
metal; steel; enamel

Lens measurer comprising a white round enamel dial marked 0-20 with + and - scales. Shiny metal.Three prongs with metal protective cover. Alloy steel finger pointer. Contained in black cardboard case with separate lid and green velvet lining. Also a leaflet printed in red and black.


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