A Moebius strip is a surface with only one sided. Mathematically it is non-orientable.
Stamp | Description |
---|---|
![]() |
Luxembourg, 3fr.1969 Scott: 480 A131a |
![]() |
Belgium, 3fr, 1969 Scott: 723 A242 |
![]() |
Germany, 30pf, 1969 Scott: 995 A293 |
![]() |
Switzerland, 30, 1974 Scott: |
![]() |
Brasil, 1p, 2015 Scott: |