I noticed these as well, also some slightly lower than 6925 kHz, down around 6921 or so. I've also noticed some CW around 6915, and elsewhere in the 6800-7000 range (courtesy of my nightly SDR recordings). Some of them were apparently French, according to some folks on the #wunclub IRC channel. Others appear to be someone else. Some of the CW is obviously hand sent, with uneven spacing and frequent errors.
I am not sure who is behind these transmissions, but I have noticed an uptick in CW activity in the 43 meter band.