Mikron Type 79 Gear Hobbing Machine. Operating Instructions with electrical schematic, a copy of a chart not in the manual but found with a No.79 machine labelled "Feed of slide for one turn of the spindle and INDEXING with change wheels." and two copies, early and late, of the maker's Sales & Specification Catalogue. This popular and long-lived hobber was in production from the 1930s until the 1980s.