Windows NT 3.5 build 683

Windows NT 3.5 build 683.1 is the official Beta 2 build of Windows NT 3.5, mentioned in the file  from Windows NT 3.51.854.1.

The Workstation edition of this build was leaked by a warez group in 1994, but the floppy disks were mistakenly dumped in 1.44MB format instead of DMF (1.68MB), resulting in unrecoverable data loss. This means most of the disk images are broken and the Workstation build is unusable.

The Server edition was leaked on the Chinese site BetaWorld on 19 October 2019, then it was leaked on 27 September 2020 to BetaArchive by Overdoze.