Fifteen unused, mint-condition postcards of "Triton of the Sea." I believe there are people who feel nostalgic, as it was rebroadcast every summer vacation during the Showa era. Just by looking at the pictures, some may start humming ♪Go Go Triton, Go Go Triton, Go Go Go Go Go Tri-ton♪, right? They have been stored at home for a long time, but there is no aging deterioration and the condition is good, I think. Please check the photos. I hope these postcards reach fans of Triton of the Sea, those who miss this era, and those interested in Showa-era anime. Thank you.