I 've only heard S06s on the Twente SDR, so my interest in the station is recent, but given the Priyom pages and this very interesting article in Enigma 2000...
http://www.apul64.dsl.pipex.com/enigma2000/newsletters/En87a.pdf#page=45... this station still remains an oddity, for all the reasons mentioned by JkC in the article.
So last night via Twente I heard the following at 0730 and 0740:
427 806 5 46062 68672 97478 39685 30485 806 5 00000
which is very, very similar if not identical to the following pattern that JkC in Enigma monitored three plus years ago:
46062 68672 97478 39685 30485 96632 52537 53317 (p. 46 of the Enigma article from 2015)
Just found the pattern by happenstance, I don't usually monitor Twente or this station in general.
I've read the article several times and know the various theories about this station's raison d'etre, curious if Ary on any other monitor knows how common it is for S06/E17z to transmit the same message over a period of many years.
A very strange station, no doubt!