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interference filter

interference filter

Gerätebau-Anstalt, Balzers
circa 1960
interference filter, 470 mu

interference filter, 470 mu

Gerätebau-Anstalt, Balzers
circa 1960
interference filter, 520 mu

interference filter, 520 mu

Wild Heerbrugg Ltd.
circa 1960
interference filter, 595 mu

interference filter, 595 mu

Wild Heerbrugg Ltd.
circa 1960
interference filter, 610 mu

interference filter, 610 mu

Wild Heerbrugg Ltd.
circa 1960
interference filter, 635 mu

interference filter, 635 mu

Gerätebau-Anstalt, Balzers
circa 1960
interference filter, double band

interference filter, double band

Gerätebau-Anstalt, Balzers
circa 1960
interference filter, multiple band

interference filter, multiple band

Gerätebau-Anstalt, Balzers
circa 1960
/ 1

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