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Yes there is Windows 2.00 Beta PC Magazines have review on it.
Correct, It seems that a number of media outlets and probably developers had Windows 2.x pre-releases, however none have been publicly archived yet.
Logically, a "regular" Windows 2.01 should also exist. We do have 2.01/386.
Additionally, Windows 2.02 did exist but was very short lived. A Windows 2.02/386 box was spotted on eBay some years back.