V24 6215 kHz 1600-? (coffee refill)
Fair to good signal 4 number groups 2/2 pattern
If you had stayed for the last half of this transmission you would have heard it transition form 2/2 format to 1/3 format. The first half and second half of each V24 transmission contains the same numbers groups, just presented in a different way.
Also, after the music there is an announcement to the intended recipient. A given recipient always has the same music lead-in.
The recipient (and thus music) is time/day/freq specific, and it is tied to days of the month vs days of the week as is common with other numbers stations. If you hear a specific song on the 17th of the month on 6215 kHz at 1600 then next month you will hear the same song at that time on that freq. However, on the 24th of the month you may hear a different song on 6215 kHz at 1600.
There do appear to be a few specific slots that alternate months, that is to say that specifc day/time/freq will only be used every other month. I have not got a firm grasp on these yet, and it might not be so, I am working on that.
Also, the last day of the month can sometimes jumble the first day of the month. For example, if the month ends on the 28th and there is normally a TX scheduled for the 28th and 29th then you will see the 29th TX on the 1st...if that time slot is normally empty on the 1st. If there is normally a TX scheduled for that slot on the 1st then the second TX is not sent.
T!
Mohave Desert, California USA