Organization mondiale du tourisme (French),
Organization Mundial del turismo (Italian)
The emblem is a globe with two ribbon signs in form of a curved "Z". At the bottom are the words "OMT.WTO.BTO" [BTO is the Russian name of the organization: (Roman characters transcription) VSSEMIRNAIA TOURISTSKAIA ORGANISATSSIA]
This emblem appears in white on a blue (UNO-ONU) flag. Proportions: 4:7.
Published in Bundesblatt für die Republik Österreisch OE 16/10/81
the flag design is confirmed (except for the lettering) by an actual flag photo. An important detail is that the scrolls extend each a tip on over the poles.
The emblem can also be seen on the World Tourism Organization website.
The logo of the World Tourism Organization was changed. According to A/19/10(h) (2011), the logo was changed in 1998. Thus, the flag was changed as well. However, according to that same document, the basic design of the flag is still the emblem on a solid field with no text. A physical copy of the flag can be seen here.
The exact design as prescribed by the Austrian 1981 law, with letters "OMT•WTO•BTO"
The equivalent design using the current acronym and language order preference ("UNWTO•OMT•ЮHBTO"), an unsure design.