Hengxing li 恆星曆 / Tang Ruowang zhuan 湯若望譔.
Manuscript copy of Schall's Hengxing lizhi 恆星曆指 made in Japan. Undated, but probably late 18th-early 19th century.
The errors in binding match the edition held in Rome. See Jap-Sin II, 38.3 for bibliographic details.

One of a number of books written in Chinese by Jesuits that were copied in Japan after the prohibition of these works. Schall's original work was published in 1631 but not widely distributed. It was not on the early Japanese lists of prohibited books.
Vermillion seal imprint: 明德館圖書庫.