Hi, Charles!
That Rappaport Bros. mold is actually a copy of a mold originally made by Schneider Bros. in Leipzig, Germany, around the turn of the previous century. Rappaport copied much of the Schneider catalog, as well as molds from other German makers of semi-round figure molds, along with their own original designs.
The figures in this mold are, from left to right, British infantry in pith helmet, Prussian artilleryman (the artillery had a ball on the spike of their Pickelhaube, representing a cannonball), and Egyptian infantry circa 1890-1900. The Prussian artilleryman was meant to be paired with a field piece casting; he's sighting along the barrel and adjusting the elevation. The Egyptian's fez looks like it didn't cast that well; on good castings, you can make out the crisp outlines of the headgear.
Prost!
Brad