Often a suffix used in file naming conventions to denote a "remastered" or "reduced" version, or simply a tag from a specific uploader.
The title is available in several formats, including standard 1080p HD, 4K Ultra HD, and Blu-ray. Due to the popularity of the lead actress and the technical quality of the "SONE" series, English-subtitled versions are also widely distributed for international audiences. 1 STYLE series? SONE-349 - English Subtitles Sone-349-rm-javhd.today02-25-13 Min
: The string seems to combine a filename or identifier ( Sone-347-rm-javhd ) with a date ( 02-25-13 ) and possibly a unit or status ( Min ). Often a suffix used in file naming conventions