The most early build available of Windows NT 3.1. It features a bootload that refers to OS2LDR instead of NTLDR.
This build installs via a batch file with paramaters. To install either start setup from OS/2 1.2x-1.3 or MS-DOS 3.1 and later and run "setup i386" to start the installation.
The MIPS version is incomplete so it won't install.
During testing with VirtualBox, select a COM port (doesn't need to be connected, but enable it) and it should boot.
There are more images available in the gallery.