Windows NT 3.1 build 199

Build of Windows NT 3.1
OS familyWindows NT
Version number1.0
Build number199
Compiled on1991

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.