Catalogued in RISM as “Concertos–A major; Manuscript copy; GB-Lbl R.M.21.c.10-15.” by Anonymus. RISM 800247352
Same music
The one encoded movement matches a Giuseppe Sammartini concerto in the same R.M. collection note for note.
Attributed copies compared (1 of 1 encoded incipit match):
1.1.1 29; 486 · vl 1 · 9 of 9 pitches agree
8'A/8.68{BB''E}/{CEA}/{8'B''CD}/'8A/{8.B6B''8E}/{8.C6E8A}/{'8B''CD}/also RISM 800226005 1.1.1 Staccato
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.