EDIT: I originally reported "M" but looking at the photo again now, I think it it is "I".
A bit outside the usual band for these but I'm hearing (and seeing) these on the KFS SDR omni antenna.
"K" on 13528.3 KHz
"M" "I" on 13528.4 KHz
"I" quickly faded after this but I continued to hear "K" for several minutes afterward.
