my bad, prldx is certainly correct.
Interesting, because at the time I was writing my response I was listening to Italcable on the Twente SDR, and there was a time tick and voice ever 10 seconds. I heard the data on the 52 second mark and the second ticks after that to the 00 (with the gap on 59), followed by voice and 10 second time ticks, in USB only. Because the 10 sec time tics and the normal Italcable were both USB I thought that was the source, now I assume you are correct on the source, and I was actually hearing both stations on that remote.
I knew that was not the normal format for Italcable, but they have played with several formats (including a 10 second announce in the past) I just assumed they were now using this one, Italcable has had different formats, including sending SSTV during the minute.
(edit) Found the picture, here is what Italcable was sending for SSTV:

T!