Chinese Commemorative Coin Set in the style of the 30th Anniversary of the People's Republic of China

This item is a four-coin set displayed in a presentation box, appearing consistent with a 1979 commemorative gold release from the People's Republic of China. Each coin faces up in a clear plastic capsule, set against a maroon velvet-style lining. The coins bear a face value marked as '400元' (400 Yuan) and depict various historical landmarks. The interior lid features red fabric with gold-tone printed text reading '紀念金幣 THE COMMEMORATIVE GOLD COINS' and 'IN CELEBRATION OF THE 30TH ANNIVERSARY OF THE FOUNDING OF THE PEOPLE'S REPUBLIC OF CHINA'. A gold-tone illustration on the lid features the national emblem with dates '1949-1979'. The coins themselves appear to have a reflective, proof-like finish on gold-colored metal, though the metal purity is unverified without physical testing. The box shows light aesthetic wear, and some oxidation or environmental residue may be present on the capsule surfaces. While the markings are consistent with a 1979 official release, physical inspection by a numismatic expert is required to determine metal composition and distinguish from contemporary reproductions. No assay certificates are visible in the image to corroborate the gold content.

Based on the images provided, I am examining a four-coin set that bears markings and presentation consistent with the 1979 release celebrating the 30th Anniversary of the People's Republic of China. I must hypothesize that these are the 1/2 oz gold proof coins, as indicated by the '400元' face value and the high-quality reflective finish visible through the capsules. From these photos, I can identify historical landmarks such as the Great Wall and Tiananmen Square, but I cannot verify the metal purity or weight without physical testing such as a density check or XRF analysis. The valuation range of $4,000 to $6,000 is based on the assumption that these are the official gold issues. This market is highly sensitive to the bullion weight of 24k gold and the numismatic premium for early modern Chinese issues. However, because I cannot confirm the gold content from an image, this estimate is contingent on the items being struck in 22k or 24k gold as specified for this series. The presence of environmental residue on the capsules may necessitate careful professional conservation; any evidence of 'PVC damage' or actual metal oxidation—common in improperly stored sets—would significantly reduce the desirability among collectors. This specific set is frequently subject to reproduction and base-metal replicas. If physical inspection reveals these are gold-plated brass or copper 'in the style of' the 1979 issue, the value would drop to a nominal range of $50 to $150. To justify a high-end valuation, an in-person examination by a numismatic expert and an assay certificate or grading from a third-party service (like NGC or PCGS) is recommended.