Windows 3.0 undated 1989 build

A photograph of a computer running what is presumed to be an unknown pre-release build of Windows 3.0 was shown by Kraig Brockschmidt, the developer of the Windows 3.0 Calculator application, running Calculator version 3.00.13 on his website. Given that the calculator in build 55 bears a version number of 3.00.16, it is possible that this build was compiled at an earlier timeframe.

A video recording of what is allegedly build 48, which clearly aimed to replicate the build shown in Brockschmidt's screenshot, was posted onto YouTube in June 2020; however, the legitimacy of the video is questionable as the uploader has not responded to queries surrounding the build itself.