Social Philately: Letter to the forced labor convict camp Berlin-Spandau, France 1944 return

Letter of the French sailor Serge Comnet of the Peniche Guny in Toulon to Berlin-Spandau to a French forced female convict to the camp Mertensstrasse.
The presumably simple town coat of arms prepaid postage has fallen with diversenen camp-, censorship- and return - remarks, in which, for the many processing stations. Inside the fact it seems that remarks as "departed without detail of the address" or " . . . fewest late forced labor convict isn't in the camp any more " very perfidious.
Letters to the store Mertensstrasse are extremely rare!
An unusual piece corresponding to the circumstances in one good preservation!