Vietnamese teletext character set made by Colin Hinson at Europe Technologies. This seems to have been for the first Vietnamese teletext service, Vitek, in 2004. The photo was taken before all the characters were finished.
The Vietnamese script needs at least 134 additional letters to ASCII, which has lead to solutions like VISCII and VSCII in the past. Hinson describes the process in detail here, but it seems like they simply removed enough characters to make it work. :-)