Windows 3.0 undated 1989 build

Craig Brockschmidt, the programmer of the Windows 3.0 calculator, has a screenshot of a Windows 3.0 beta on his website.

Given that the calculator in Windows 3.00.55 has the version number 3.00.16, the build of Windows 3.0 shown here probably does not have the version number 3.00.13.