The dial of the Grand Seiko Boutique Online limited edition has been specially treated. The unique indigo dye Katsu-iro has a long tradition that can be traced back to Japan during the Warring States Period in the 15th century. The unique blue hue of this indigo dye symbolizes victory, and it is proudly used in armor worn by samurai. Grand Seiko deployed this color on the dial of SBGC238 before, and it worked very well. Today, Grand Seiko combines this vibrant hue with the brand’s acclaimed Iwao or rock pattern. The SBGA469 dial is the highly versatile Spring Drive kit in the Heritage Collection. SBGA413 Shunbun is probably the most…