For auction is a very nice original WW1 German real photo postcard showing Bavarian assault troops, known by the German names Stosstruppen or Sturmtruppen (Storm Troopers). They all wear Stahlhelms. Four have Artillery Lugers drawn or in their belts, two have Gewehr 98 rifles, and there are several Stielhandgranaten (hand grenades). Two of the soldiers wear a rare variant of trench knife, having a "crank handle" with wooden grips made by the firm of Carl Schlieper Solingen. 

The reverse is nicely filled out, sent to the soldier's family in November 1917. In the message, Stosstruppen is mentioned (I have digitally underlined it in red in one photo). 

Naturally, the transparent "wimilitariacollector" is not on the actual photo. The card measures 5 1/2 x 3 1/2 inches. 

Thanks for looking and good luck!