Windows NT 3.1 build 199

1.199
Build of Windows NT 3.1
Screenshot
OS familyWindows NT
Version number1.0
Build number199
Architecturex86

Windows NT 3.1 build 199 is a build of Windows NT 3.1, which was mentioned in the file TEXTHIST.XLS from the Windows NT 3.5 build 782.1 source code. This build was being tested on 19 September 1991, so it was almost certainly compiled shortly before that.