I've owned many Ishapore MkIII's from 1919 to 1924 or so that had the cutoff, but no volley sights. I've never owned a pre-1918 Ishapore that had not been updated to at least post-war pattern (e.g. volleys removed and new forestock).
They are rather rare.
Союз нерушимый республик свободных Сплотила навеки Великая Русь. Да здравствует созданный волей народов Единый, могучий Советский Союз!