I used to use that fingering a lot. It’s part of the clarion so matches those notes better and extends the break rather than having to cross it.IMHO, it is basically the start of the altissimo fingering. Sometimes I use its alternate, the 2 right-hand trill keys with high C.
View attachment 30017
From Yamaha's free downloadable fingering chart. See:
![]()
How to Play the Clarinet:Fingering diagram for the clarinet - Musical Instrument Guide - Yamaha Corporation
This is the Yamaha Corporation [Musical Instrument Guide] website. This article contains information about the Clarinet [How to Play the Clarinet:Fingering diagram for the clarinet]www.yamaha.com
