This is a Bund Deutsche Mädel (BDM) Klettervest from area “Südost Oberdonau”
It is in good condition. The arm triangle is missing, but you can see were it was.
All buttons present.
There’s a name written inside “MIRIAM”, and a stamp from Vienna -> M.C. WIEN!
These unmessed with BDM jackets are getting harder and harder to find today.