S06 on 9135 kHz this morning; parallel transmission heard in the background

A very strong (+10db) and clean signal this morning on 9135 kHz at 0810z, allowed me to hear the audio of a second, weaker, S06 transmission occurring in the background. Initially I thought that since S06 transmits on 7440 kHz (ID 418) at the same time, maybe it was the audio from that transmission. But after listening more carefully, the second YL calls "471"! This is a sample of what I heard. You can hear the second call (471) easier near the beginning of the message.

Is this common for S06? Who knows...

S06 Numbers Station

S06 Russian young lady was on 7740 kHz at 0809z, exactly as the painstaking fans of Slavic numbers stations predicted in the latest Enigma 2000 Newsletter, with the ID "352" repeated for some 4 minutes. I had a very clear signal, except from a RTTY pest about 4kHz higher, but after some DSP filtering it sounds great. Listen my recording: Can you hear the echo? It was a short 7-group message, ending "0 0 0 0 0". If you are bored with the ID, fast forward to the 4th minute of the recording!