newshell.zip  - Date:26/05/1995 - OS: NT 3.51 - Shell Update Release
newshell2.zip - Date:09/08/1995	- OS: NT 3.51 - Shell Update Release

"Microsoft also released at least two alpha-test verions of the a Shell Update Release (SUR) which added the Windows 95-style desktop and taskbar, and Windows Explorer to Windows NT 3.51, it was very buggy."

http://www.nthelp.com/proggy/newshell.zip
http://toastytech.com/guis/newshell2.zip