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2 prisms in box Crookes Mid 20th c. View |
Binocular Prism Vergence Tester Early-mid 20th c. View |
Glass cube Late 20th c. View |
Landolt's Double Prisme & case L. Giroux c.1920s? View |
Maddox Bi-Prism Mid 20th c. View |
prism View |
prism 20th c. View |
prism View |
prism View |
prism View |
prism 20th c. View |
prism View |
Prism Bar Clement Clarke Ltd Mid-late 20th c. View |
prism trial case & frame Clement Clarke Ltd Mid-late 20th c. View |
prism trial case & frame Theodore Hamblin Ltd Mid-late 20th c. View |
prism trial set Early 20th c. View |
prismatic spectacles View |
prismatic spectacles View |
Set of miscellaneous lenses and prisms Max Kochmann Ltd; Optolis 1960s View |
Set of Porro Prisms Mid 20th c. View |
Stock 3016 Pentagon Prism Edmund Salvage Company Late 20th c. View |
The Light Crystal Tedco; BellTree Fun & Science 1986; 1999 View |
variable prism 20th c. View |
variable prism Cretes, A. View |
variable prism disc Mid 20th c. View |
variable prism disc Mid-Late 20th c. View |
variable prism disc Theodore Hamblin Ltd Mid 20th c. View |