Catalogued in RISM as “?Sonatas?–B♭ major; Manuscript copy; I-Tf 12 II 2-39” by Anonymus. RISM 850023629
Same music
The one encoded movement matches a Schröter concerto (RISM 124898) note for note.
Attributed copies compared (1 of 1 encoded incipit match):
1.1.1 Allegro · cemb · 14 of 14 pitches agree
'8F/{B''gC'3BAB''C}{'6BB''DF}/{FE8E+}{E6DC}/{C'B}4B8'F/{Bg''C3'BAB''C}{6'BB''DF}/{6FE8E+}{E6DC}/{C'B}4Balso RISM 124898 1.1.1 Allegro
also RISM 400004941 1.1.1 Allegro
also RISM 452508396 1.1.1 Allegro
also RISM 455001024 1.1.1 Allegro
Catalogue data and incipits come from RISM (Répertoire International des Sources Musicales), CC BY 4.0. Incipits are rendered with Verovio. Source and data: https://github.com/aaymeloglu/rism-attributions.