 |
 |
 |
 |
H = 2 ¼", D = 1 15/16" |
H = 1¾", W = 2¾" |
H = 2", W = 2¾" |
H = 2 5/16", W = 2 13/16" |
PAT AUG 30 1880
|
78 LUXFER // PATENT APPLIED FOR |
76 // LUXFER // PATENTED SEPT 14 1909 |
BERGERS // 3 POINT // PRISM // No. 8 {anchor} |
Leo Popper No. ? |
Luxfer No. 78 "Square Blank Lens" |
Luxfer No. 76 "Sidewalk Prism" |
Berger's No. 8 "3 Point Prism" |