Windows NT 3.1 build 475

Windows NT 3.10.475.1 is the 1993-06 beta of Windows NT 3.1. It was uploaded to BetaArchive on 2017-02-25, and is also mentioned in an internal Microsoft e-mail from 1993-08. Apparently, this build was delivered to Novell in 1993-06 to test their NetWare Client for NT. The e-mail also claims Novell had also received the 1993-04 beta sometime earlier.

This build refers to itself in the boot screen and Winver as build 4755, and as build 475 on the default desktop wallpaper. It's possible that 4755 was intended to be 475.5. A similar thing can be observed in the final build, 3.10.511.1, where the kernel's file version is 3.10.5098.1, perhaps meant to be 3.10.509.8.