I came across this plaque in a book about the community in FF, specifically in the chapter on the Realschule. It seems that it is similar to the WWII version in our shul, except that this lists the fallen in battle- and ours lists the enlisted men with two fallen.
My grandfather Max Meyer is a Realschule alumnus who, though he survived the war, died in his fifties of a wound sustained in battle. He was a field commnader and was standing to asess the situation when shot. A second bullet haeaded to his heart was interceptedby the large Tanach and siddur he kept in his backpack. My uncle is in posession of those books today with an inscription attestng to the date and event.