Catalogued in RISM as “Clarinet concertos–E♭ major; Manuscript copy; CZ-K 1346/a” by Anonymus. RISM 1001150759
Same music
Movements I and II match Weber's Clarinet Concertino, J. 109; the second movement's comparator is a whole tone lower, a concert-pitch against B-flat-clarinet difference.
Attributed copies compared (2 of 3 encoded incipits match):
1.1.1 Adagio ma non troppo · vl 1 · 11 of 13 pitches agree
'''2C{8.''C6C}/4C{8.'G''6C}4Ct/D{8EnEFA}/'4C8,nB-4-/'nE8F-4-/'''2C''{8.6CC}/4C{8.6'G''C}4Ct/D{8EnEFA}/'4C,8nB-4-/also RISM 1001254592 1.1.1 Adagio mà non troppo
also RISM 550504372 1.1.1 Adagio
1.2.1 Andante · cl in B · 16 of 16 pitches agree
2''F8C-4A/2''A8D-4G/C4.'''C{8''BGE}/4.F8A{CxCDE}/2''E8'B-4''G/2G8C-4F/'B4.''B8{AFD/4.E8G{'BnB''CD}/also RISM 1001254592 1.2.1 Andante
1.3.1 Allegro · cl in B · 7 of 21 pitches agree (too short to count)
8-{8nB''C}-{FA}/-{AD}-{AB}/-{'nB''C}-{nB'''C+}/{C6''bBAGF}{EDC'nB''D'B}/8-{'nAB}-{''EG}/-{GC}-{GA}/-{'nB''C}-[''nAB+}/{B6AGFE}{DC'BnA''C'A}/8BCatalogue 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.