Germany

Aelteste Volkstedter Porzellanfabrik, Unterweißbach, Thuringia (1894-1936)

Armand Marseille Köppelsdorf, Thuringia (used between 1900 and 1919)

EPH - Elektro-Porzellanwrk Hennigadorf

VEB Elektrokeramik "Arthur Winzer" Berlin (1980-1995)

Hunsruck Porzellanfabrick - Emmelhausen, Germany

Julius Hering & Sohn Isolatorenwerk -Germersheim, Rhine (post WWII)

Julius Hering & Sohn Isolatorenwerk - Köppelsdorf, Thuringia (through WWII)

Wesselwerk Bonn - Located in Bonn -Poppelsdorf it was founded in 1755 and existed until 1969.

Brand used by Maschinenfabrik Reinhausen GmbH - Located in Reinhausen Germany

FAMEX

SCHOMBURG

Note these markings are found on insulators from Germany, but the maker is not yet known. If you have information on any of these please contact me with any information!