Colchester Student, Master and Dominion Lathes Mk 1 and "Mk. 1½" (and other versions, by Clausing the 13 x 24 and 13 x 36 etc). Round-headstock model but with either a "sliding-lever" on the apron that lifts into either one of two slots to engage the power feeds - or with a single, centrally-mounted round control lever. The differences between Mk. 1 and Mk.2 Student lathes are shown on my page at: http://www.lathes.co.uk/colchester/page2.html This is a specially assembled, very high-quality Data Pack that gives all known data for these popular lathes comprising: Instruction and Maintenance Manual and Exploded Component Parts Manual with detailed screwcutting instructions, enlarged and clear screwcutting charts including the elusive metric thread-dial indicator and data about how to generate inch and metric pitches from those models without the dual inch/metric box. In addition to covering ordinary models this edition includes information about the rare all-metric screwcutting gearbox version; the "Third-shaft electrical control" version with special Klockner Moeller switches and details and a Parts Manual for the English and metric "Quick-threader" units and the Hydraulic Copy equipment. Also includes greatly enlarged and clear Electrical Circuit diagrams and copies of the maker's Technical Specification, Sales and Accessories Catalogues. Also covers the same lathe sold in the USA as Clausing Models: 6564, 6565, 6524, 6525, 6566, 6567, 6526, 6527, 8010, 8011, 8012, 8013. In addition, the lathe was manufactured in Taiwan and branded B.I.E. this model has the early twin-slot apron but a "squared-off" headstock casting and an apron with the carriage handwheel to the left rather than to the right. The manual also helps with the Indian-made Parmar HMP No.1 whose screwcutting arrangements and the complete carriage assembly were copies of those on the Student.