Catalogued in RISM as “Overtures–D major; Manuscript copy; D-Dl Mus.3556-F-516” by Anonymus. RISM 270002463
Same music
All three encoded incipits (Allegro assai, Andantino, Allegro con spirito) match the Sinfonia of Cimarosa's L'amor costante in the Dresden score of the same library (Mus.3556-F-512, given as Giulietta e Armidoro in 1790); copies of Il ritorno di Don Calandrino and L'Armida immaginaria open with the same Allegro. The anonymous record names Cimarosa only as the composer of L'infedeltà fedele, into whose overture this sinfonia is bound as a Dresden alternative.
Attributed copies compared (3 of 3 encoded incipits match):
1.1.1 Allegro assai · vl 1 · 12 of 12 pitches agree
2.'''D4''A/2A{8GFED}/2.'''D4''A/2A{8GFED}/2.'''D4''A/2A{8GFED}/2.'''D4''A/2A{8GFED}/also RISM 270002458 1.1.1 [Sinfonia]. Allegro assai
also RISM 550019154 1.1.1 Overture. Allegro assai
also RISM 850008343 1.1.1 Overtura. Allegro spiritoso
also RISM 850008400 1.1.1 Sinfonia. Allegro assai
1.2.1 Andantino · vl 1 · 20 of 20 pitches agree
qq6''DEFr8G-D-'B-/4G--/6{AB''C'B}{AB''C'B}q6''D{8C6'BA}/{8GG}G-qq6''DEFr8G-D-'B-/4G--/{6AB''C'B}{AB''C'B}q''D{8C6'BA}/{8GG}G-1.3.1 Allegro con spirito · vl 1 · 20 of 20 pitches agree
6''D/4D8-3-{'AB''C}/6{D'A''D'A}{''ECEC}/{FDFD}{GEGE}/6''D/4D8-3-{'AB''C}/{6D'A''D'A}{''ECEC}/{FDFD}{GEGE}/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.