Issued by Matsumoto Kisho Kogyo, this is a limited edition of 5,000 sets nationwide. For railway enthusiasts and those in the Tohoku region, thank you for your interest. As shown in image 2, a certificate of authenticity from Matsumoto Kisho Kogyo is also included. As shown in images 3 and 5, it has a three-dimensional convex design with a proof finish, featuring both glossy and matte areas. It was manufactured by backing pure copper onto a pure gold sheet. The surface is stamped with a pure gold hallmark (image 8 is in the lower right, image 9 is in the lower left), and the back is stamped with a pure copper hallmark, permanently guaranteeing its purity. However, the ratio of pure gold to pure copper is unknown. In 1982, the price of gold was around 2,600 to 2,900 yen per gram (Tanaka Kikinzoku). Currently, the price of gold is around 20,000 yen per gram, so it has increased significantly. Although approximately 43 years have passed, it is kept in very beautiful condition as shown in the images. It will be shipped via Letter Pack Light.