This is a FCS-only head mold. It was released in Japan in June 2015. The Full Choice Handbook: 2016 by Volks shows the head mold with 18/9mm eyes, and notes that there are visible teeth that can be painted. This head was a Tenshi no Sato exclusive. On September 21st, 2019 this head was made available at all Sumika locations.
Please click on the individual thumbnails to see the pictures full-sized.