I am glad someone noticed. :-) It is the File Manager icon. I would be just a little reluctant to use it verbatim on copyright grounds, but File Manager and its icon are now free: https://github.com/microsoft/winfile. I have always liked this icon and the aesthetic of graphics made for Windows 3.x, even though my first Windows was 95 OSR2.

If you liked it, you may enjoy my page https://dbohdan.com/gui-games.