GAT records say that it’s early medieval, first phase (1066 to 1237). Looking forward to visiting after lockdown.
https://archwilio.org.uk/arch/query/page.php?watprn=GAT4117&dbname=gat&tbname=core&sessid=CHI2evysum2&queryid=Q360203001615055691
The above GAT record has a pdf link to a fascinating paper on Gwynedd Medieval Stone Carvings -
http://www.walesher1974.org/her/groups/GAT/media/GAT_Reports/GATreport_938_compressed.pdf
Something is not right. This message is just to keep things from messing up down the road