Party Princess 1.
This Lady Lynn comes in a big box with a section for accessories. Marking on the right foot: "Bandai 1987 made in Japan". This line included only dolls wearing party dresses, while Osharena Lady Lynn had both party and casual wear. However, Party Princess and Osharena dolls are identical in terms of head mold and body. The releases are numbered, but it's possible that the numeration was restarted for Hello! Lady Lynn dolls (compare with Hello! Lady Lynn Party Princess 1).