Here is a cover that was mailed from Los Angeles, CA, USA on July 8, 1911 to London, England. When it arrived it was forwarded to Cologne (?) on July 24, 1911 with a Thomas Cook & Sons (TC/&S) perfinned stamp added to cover the new mailing cost. Not a rare cover under any circumstances, but a nice one with a lot of activity going for it.
*** Edited by Staff to clarify topic title. Titles are important! ***