Helipot, a helical potentiometer. I purchased this a while ago and have been storing it unused for a long time. When I tested it, the shaft rotation seems to be a 10-turn type, from end to end. The specifications, such as resistance value, are unknown, so please judge based on the model number and markings in the photos. (I apologize that I cannot answer questions regarding specifications due to my lack of knowledge.) If anyone can utilize this for electronic work, please consider it with the understanding and acceptance that it is a long-term storage item. It will be shipped via Nekopos (a Japanese delivery service).