Finally got back to some swords that have been around for a bit, now that the Christmas rush at work is over. Have a VERY nice Kai-Gunto by TSUKAHARA KANETSUGU. It's a SEKI marked blade, signed 濃 州 住 塚 原 兼 次 謹 作 - NOSHU JU TSUKAHARA KANETSUGU KIN SAKU   Haven't gotten any chance to take full pictures, but we found a very interesting marking on one of the seppa, which I have not seen before. It looks like TFC and a cherry blossom with an anchor. Does anyone know what these stand for?