Any insulator from Koransha is extremely scarce to locate and get from Japan, especially with colored glazing. During my trip to Japan, the only Koranshas I saw were either all white or white with the orange band, were much newer and even getting those are near impossible unless you have contacts. This 1923 dated insulator looks almost like a bullers type with dark cobalt blue Koransha logo and date underglaze inked on the piece under the WG. Snow white glaze and VVNM condition with no real issues. Very nice piece for your foreign porcelain collection. Please note that these insulators are VERY hard to get and will not be going on sale. It took me 4 years to locate these and the 1 for my collection. $149 shipped USA/CANADA.Other countries I'll equally assist with shipping.