Shell carvings in the 1970s with certain characteristics and high artistic level, especially those with unique shapes, exquisite carvings and exquisite decorations, have high collection value. These works reflect the level and style of sculpture art in China at that time and have certain historical and cultural significance. At the same time, as a special historical period, the shell sculptures in the 1970s also bear the imprint of the times, which is of certain reference value for studying the art and culture of that era.
However, to determine the specific value of the shell carving paintings, we need to consider the quality of the works, the author's popularity, the state of preservation, the degree of circulation and the market demand. If the works are of high artistic value, the author is a well-known artist, well-preserved and sought after in the market, then their collection value will be higher.
It is worth noting that collecting art is a complex investment behavior. If you don't have the professional knowledge and experience of shell carving, I suggest you consult a professional art connoisseur or art institution before buying or collecting shell carving to get more accurate evaluation and suggestions.