I think I can answer all the foregoing questions. The book, "Clandestine Pistols of the Second World War" on page 131 makes specific mention of these special weapons produced by the OSS. It explains that the reason the Luger was chosen was because of its unique toggle action which allowed it to be fired from a pocket without a retracting slide catching on the cloth. Tests showed that a full clip could be discharged with no problems. It further documents certain assinations in which this weapon was used.