Fair signal of E11 Oblique in 6MHz, August 31

NUMBERS STATION   Fair signal of E11 Oblique in 6MHz, August 31:
0710-0713 on  6480*unknown secret tx site to Eu English USB mode
*former frequency of KBS World Radio on air many, many years ago
https://www.youtube.com/watch?v=RkWvZc6_Hks&feature=youtu.be