[1] Abkhazian Che is used in the alphabet of the Abkhaz language, where it represents the voiceless retroflex affricate /ʈʂ/.

[2] It was used in the old Abkhaz alphabets, where it represents the voiceless retroflex affricate /ʈ͡ʂ/.

The letter was invented by baron Peter von Uslar.

[3] The letter is Ҽ-shaped but in 1887 Uslar's study was reprinted by M. Zavadskiy who changed its shape and the result resembled a Cyrillic Ч doubled.

[3] Later the letter returned to its initial form which, created by linguist Uslar, is part of the modern Abkhaz alphabet, which is depicted as Ҽ.