2 suites (Ballo and Sonata) in D major for 3 bass viols
CZ-Kra A 898
Cornetto; Strümper, Viennese music with viols
The parts are simply labeled Viola Prima, Viola Seconda and Viola Tertia, but violas da gamba can be deduced with certainty from the chords in all three parts.
Marc Strümper, Die Viola da gamba am Wiener Kaiserhof, Tutzing, Schneider, 2004, pp. 171-172