The "Luna" of the mid-Showa era was an art supply store based in Sannomiya, Kobe, and it continues to uphold that tradition today. In the early Showa era, Ebiseya sealed natural mineral pigments in test tubes and sold them with labels. These labels featured a white background with a double red border, and both manufacturers are important sources for authenticity verification. 〇 Kamakura Honshu (16.5g) "Kamakura Honshu" released by Ebiseya is a natural vermilion-based mineral pigment, referring to the traditional red pigment originating from the Kamakura region. Brands like "Kamakura Honshu" are of high quality, selected from natural cinnabar, and embody the essence of the craftsmanship of the time. It is a rare natural product, distinct from artificial vermilion and new mineral vermilion. It is difficult to obtain today, making it highly valuable. * Rarity Value: Kamakura Honshu is even more premium than ultramarine and malachite, was highly valued at the time, and it is almost impossible to find pre-war test tube versions (from that era) now. Estimated Market Price: 16g = Label with age-related deterioration, opened → Approximately 120,000 to 200,000 yen 〇 Biryokushō (14.25g) This product, released by Ebiseya, is a natural malachite-based mineral pigment, with beautiful color development, and is a specially selected premium grade, known for its transparency and vividness. As a rarity, malachite from this period is an important color in Japanese painting materials and is a premium product. 〇 Red (Aka) (22.8g) "Red" made by Luna in the early Showa era is a natural mineral pigment made by crushing minerals containing iron and red earth. It has a simpler and more powerful color tone than crimson or vermilion and is used in a wide range of applications, such as flowers, clothing, and backgrounds. It is one of the basic colors, and those from that era are highly valuable as historical materials. 〇 Kuro-Gunjō (14.16g) "Kuro-Gunjō" released by Luna in the early Showa era is a natural pigment among ultramarine-based mineral pigments, with a particularly dark, deep blue color with a blackish tint. Kuro-Gunjō from the early Showa era was made by crushing and water-washing ultramarine. Although it takes time to crush, it is slightly cheaper than ultramarine in terms of price. 〇 Matsuba Byakuroku (13.29g) This is a rare item with a color tone that combines deep green like pine needles with byakuroku (pale malachite). It is softer than deep green and more substantial than byakuroku, suitable for backgrounds and clothing colors. It is treated as a rare item in the collector's market. Total: 81g In particular, natural mineral pigments in test tubes from that era have antique value and are sometimes traded at high prices as research materials and collector's items. (From AI research data) The photos and descriptions are all that is available, and we look forward to your purchase after sufficient verification."