The names Chihaya, CHY-SB and CHY-SB are found on Japanese shutters of the 1950s. The word CHY might correspond to Chihaya, and these names are probably related.
The CHY-SB shutter, with B, 1–200 speeds and a self-timer, is externally similar to the S. Luna shutter, of which it is perhaps a successor.
List of cameras equipped
This list is incomplete, and not all the versions of the listed cameras have these shutters: