MITSUI SEIKI 7B OPTICAL JIG BORING AND MILLING MACHINE SALES CATALOG. Catalog Contains Specifications, Information, Accessories for Mitsui Seiki 7B Jig Borer. Condition is Good, however it does have 3 hole punch in it and is 16 pages. Mitsui Seiki Machines are made in Japan. Shipped with USPS.