It looks lossless to me, though it would be easier to tell if the music was a bit 'denser'. Note also that the 15.7 kHz tone might not mean that it is a TV source, just that there was a TV on at some point during the analogue recording process. Some CRT TVs/monitors emit massive amounts of the flyback energy, such that it can be picked up during the (analogue) recording. Having said that, I would still think that it's likely to be sourced from TV. It might be worth checking to see if the recording is listed on db.etree.org and what (if any) sources are in circulation.