I found the pedigree of my oldest Seal Lynx I found it via the Love Leopard plum male.
So this was around Valentinesday.
I see in your charts the Seals were about found in the winter.
So I'm sure there are older pedigrees which show Seal out there but I thought to set a marker.
I switch accounts with my cats frequently which sadly made me lose some data.
Because I had an older kitty than Huntress (I gave her later to Khea) and you can quess his name: Hunter this was her full borther

The warrior marks on their cheeks made me name them this way.
Attached my pedigree:
EDIT actually my memory lost me I found hunter and he was born later and would have been 232 days old if he was to be live today and Huntress 277 days.