Op. 176 by Carlo Munier is the Adagio e Rondo. I have found a recording of this composition by a mandolin orchestra from Korea.
This piece has been composed for mandolin quartet or mandolin orchstra, but there is also a version for two mandolins and piano:
20051119 Adagio e Rondo (C.Munier)
Carlo Munier – Adagio e Rondo
2005/11/19 – Regular Concert
Soongsil University Mandolin Orchestra
This is the beginning of the Adagio (1st mandolin):
And the beginning of the Rondo (1st mandolin):
Enjoy the Adagio and Rondo by Carlo Munier!