Vintage Somayaki Double-Wall Crackle Glaze Mug Gold Horse Soma Ware Hearts Japan

Vintage 1970s. Five Somayaki tea cups with horse art in gold paint. Marked Made in Japan on the bottom. They look to be in very good condition. No chips or cracks were seen.
Some cups have a tiny bit of gold trim on rim worn off but that is the only flaw I can find.