Windows NT 3.5 build 683

Windows NT 3.50.683.1 is mentioned in file  from Windows NT 3.50.854.1. It is the official Beta 2 build. Workstation edition of this build was leaked by a warez group in 1994, but the floppy disks were mistakenly dumped into 1.44MB images instead of DMF images. This means most of the images are broken and the build is unusable. Advanced Server edition was also leaked apparently, as it's mentioned in a warez CD list, but remains to be found.

Bootdisks for this build are available on BetaArchive FTP.