With immense gratitude, the following time line on the history of Fr. Stübgen & Co. Erfurt was generously supplied by Achim Stübgen.  This information is copyrighted and may not be reprinted in any form or matter without the consent of the owner. Copyright © Achim Stübgen, Hannover 2015 (stuebgen@hotmail.de)

Source:
Source: Stadtarchiv Erfurt, Staatsarchiv Chemnitz, Privatarchiv Achim Stübgen, Hannover, „Die Deutsche Lampe in Wort und Bild“ Berlin 1911, "Industrie- und Handelszeitung" Nr.335 von1924,
Margarete Winkler „Die Metallindustrie Mitteldeutschlands in ihrer geschichtlichen Entwicklung“ Diss. rer. pol., Halle/Saale 1934

FR. STÜBGEN & CO. ERFURT LANTERN DATING TIMELINE