On Saturday, 10 September 2016 09:04:19 UTC+1, Andy Burns wrote:
wrote:

A clearer pic might give us slightly more clue.

I thought it had been identified as one of these?

http://uk.farnell.com/texas-instruments/ri-trp-wr2b-30/rfid-transponder-134-2khz-glass/dp/1902162#techDocsHook

You can tune into 134.2 kHz here.

http://websdr.ewi.utwente.nl:8901/

Frequency: Type in 134.2 and hit enter.

Waterfall view: Max in.

It is still there.