Köchel number

Named after Austrian musicologist Ludwig Ritter von Köchel (1800–1877).

Köchel number (plural Köchel numbers)

1. A number assigned to each work composed by Wolfgang Amadeus Mozart.

   Synonym: K

   • 2014, Virginia Euwer Wolff, The Mozart Season, Square Fish, →ISBN, page 78:

     Every Mozart piece has a Köchel number. The Fourth Concerto is K. 218, and the highest Köchel number is 626. I was spending my summer with a Köchel number.

•   Köchel catalogue on Wikipedia.Wikipedia
• “Köchel number”, in Lexico, Dictionary.com; Oxford University Press, 2019–2022.