Catalogued in RISM as “Symphonies–C major; Manuscript copy; I-OS Mss.Mus.B 3854” by Anonymus. RISM 850604858
Same music
The one encoded movement matches: Symphonies–C major (RISM 850604079, 1.1.1 All.o).
Attributed copies compared (1 of 1 encoded incipit match):
1.1.1 Allegro · pf · 16 of 16 pitches agree
'4.C{3CDEF}4.G8E/''4.C{3DC'BA}4.G{3BAGF}'4.C{3CDEF}4.G8E/''4.C{3DC'BA}4.G{3BAGF}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.