The Nazis did indeed, possess a strange sense of humor. The Smiling face on the Herz (heart) may have come from the patronage of the uber-wealthy Kesselring family. Their eldest son, Albert- was "Ein Feldmarschall" and until the failed attempt on Hitler at the Wolfschantz in June 1944 (Wolf's Lair in Rastenburg/Prussia) was known as "Smilin' Al- and was loved by his troops, both Offizer und Soldaten alike.
More examples-- One night at the Berlin Opera Haus- a featured Wagner "Gotterdamerung" production- the lead tenor came on stage resplendent and bedecked with ribbons and sashes and shiny medals- and a German Frau exclaimed out loud to her husband- Mein Gott- Ist dem Herman Goring und pyjamas??
After the Nuremburg Acts of 1934- Jewish businessmen became disenfranchised in Germany and Simson was one of them, the Nazis did not differentiate between a baker and a gun maker in their dislike of the Jews, so the Star of David stamp was removed, just as you said..
