Thanks to all. I am being told that the yellow flag one, is the standard Prussian sleeve patch for Infantry. The other larger red one, according to experts is not true military but probably a 1920's veterans association standard bearer's patch. The embroidery on both of these is of excellent period quality. Note also that like the first Bavarian patch, the red Prussian has a cloth backing and shows the embroidery threads on the reverse. The standard Prussian infantry has a black cloth backing, covering the embroidery.