Two more trio's in the same instrumentation, Ms, according to Zeyringer. https://music4viola.info/work-info/6/P%F6ssinger%20F.a./trio-d-major-op-28-for-flute-viola-and-horn
Instrument List
Flute, Viola, Horn
Classification
Original Instrumentation
Publisher
Otto Biba
Directory, No.
op. 28
Musical Key
D-major
Seite 1 / Page 1 Edition: Amadeus Verlag, 1979
Vorwort / Preface Edition: Amadeus Verlag, 1979
Notenbeispiel / Score example Edition: Amadeus Verlag, 1979
Notenbeispiel / Music example Viola Edition: Amadeus Verlag, 1979