Joe,
very curious indeed. The one (and I mean ONLY one) Graf v. Breßler who appears to have served in the Prussian Army was Joachim Graf v. Breßler, Freiherr v. Apel, a reserve officer and Legationsrat in Husaren-Regiment Nr. 7. Rittmeister d.R. Graf v. Breßler was KIA serving with R.I.R. 217 on 4 October 1916 at Woinin. He had served his entire pre-war reserve service with HR 7. His half-brother, Karl-Hubertus Reichsgraf von Breßler was killed on 17 June 1917 in Flanders as a member of Kaiserliche Kraftfahrkorps. There is nothing to suggest Joachim's elder brother, Gregor, born 1872 (who did survive the war), served in any military capacity.
Regards
Glenn