Help ID Vase, Mystery K mark dot in a square

I have a vase with a distinct mark that I have been unable to identify. I hope someone here can help. The vase has a blue and green glaze and measures 4-7/8 inches tall (approximately 12 cm). The vase has impressed geometric shapes around and under it. The mark on the bottom appears to me to be a "K" in a square or box with another symbol to the right of the "K". Any help is appreciated.