“Sketch leaf” (lost), K. 626b/50
av Wolfgang Amadeus Mozart

Mozart’s “Sketch leaf” (lost) (K. 626b/50) is a missing, poorly documented item transmitted only through catalogue mention, with no surviving musical text. Because the leaf itself is lost and no incipit is preserved, its connection to Mozart—and any possible link to Requiem materials (K. 626)—remains doubtful.
What Is Known
“K. 626b/50” is listed in the Köchel catalogue supplements simply as a “Sketch leaf”, described as lost, with no extant notation, and therefore no secure key, instrumentation, date, or place of origin can be given.[1] The Salzburg Mozarteum Foundation’s Köchel-Verzeichnis entry for the Requiem in D minor, K. 626 notes the broader grouping “K. 626b/01–56” as associated supplementary sketch-and-fragment material, but it does not, by itself, document K. 626b/50’s specific musical content or provenance.[2]
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Given the absence of the source, K. 626b/50 is best treated as a lost and possibly spurious/doubtful item: attribution cannot be tested paleographically, and any stylistic or contextual linkage (including to the late Vienna period of 1791) remains speculative.
Musical Content
No musical content can be described: the sketch leaf is lost and no incipit or transcription is reported in accessible reference summaries.[1]
[1] Wikipedia — Köchel catalogue (entry listing K. 626b/50 as “Sketch leaf” (lost) among K. 626b items).
[2] Salzburg Mozarteum Foundation — Köchel-Verzeichnis entry for KV 626 (*Requiem*), noting the associated range “KV 626b/01–56.”




