thanks for the extra photos,.though for a proper & final analisis on the whole shirt & not just the buttons more information is needed,.material,.RZM tag present? or remnants of,.. close-up detailed pics of the district triangle & sig rune insignia & shoulder board etc,,pics of the shirt inside out,at the moment we know at least some of the buttons have been replaced if not all.as i said earlier replacement unmarked bakelite buttons were used.from the photos you have posted so far it is hard to say anything for cirtain,but the blouse does seem to have RZM pattern characteristics,.but yeah,.if you want a cirtain final analisis on the shirt better & more detailed pics are needed.in the downloads section in the reserch bar on this forum you can find the Reichszeugmeisterei (RZM) booklet if you want to research exact measurements on district triangles & sig rune insignia & blouse',.its all in there.
cheers,
si