Flags whose reverse differs from the obverse
This article concerns national, sub-national and historical flags whose reverse is, or was, at some point of their history, different from the obverse.
Flag of Moldova 1:2
Flag of Paraguay 3:5
Note: While the flag was officially two-sided, in practice the flag was usually made through and through.
All flags of the constituent republics of the Soviet Union did not bear the hammer and sickle on their reverse side.