Hello, this item is a Korean Buncheong-style stoneware moon jar-form vase, likely a late 20th-century studio or decorative ceramic rather than an early Joseon-period example. The rounded body, narrow neck, grey-green stoneware body, incised cloud-scroll pattern, and fish medallion decoration all reference Korean Buncheong ware traditions of the 15th and 16th centuries, when slip, incision, stamping, and iron-painted motifs were used on functional and ritual ceramics. However, the even decorative program, modern maker’s mark on the underside, clean finish, and condition indicate a contemporary revival piece made in homage to historic Korean ceramics rather than an antique museum-period vessel.

The vase appears to be in good condition, with no visible chips, cracks, or major glaze losses in the photographs. The reddish unglazed foot rim and firing marks are consistent with studio pottery production, and the hand-incised surface gives it stronger decorative appeal than a molded souvenir piece. Because the maker is not yet identified as a recognized Korean ceramic artist, the market value remains within the range for good-quality modern Korean-style studio ceramics. Based on the size of approximately 6.75 inches high by 7 inches diameter, decoration, condition, and likely late 20th-century production, the fair market value is $150 to $350 USD.