- [after 1920]
Brown leather case has a metal snap and is stamped on the front with "Rollei F&H", and on the back with "GERMANY." The small clear glass filter is printed with "Carl Zeiss Jena, Proxar 1, Nr. 585040." The large clear glass lens is printed with "Carl Zeiss Jena, Proxar 1, Nr. 573601." A card identifies the lenses by name and number in German, French, and English: "These Proxars are so adjusted to each other that, when attached to objectives having exactly the same foci, they again give uniform foci and thus also bring about the same alterations in extension for focusing to various distances."