Three MATHEYS "Semi-Jig Boring Machines" Catalogues. All are highly detailed with many
illustrations, annotated control diabrams, some sectional drawings, Accessory Listings and price lists. The first,
in English, with 8 pages, covers the Types FPN-28 and FPN-PO; the second concerns the SP-30 and SP-35, the third, is a 6-page Catalogue in German covering the SP-30, 35-NC and 3A models. 32 pages in total