HEPWORTH HYDRAULIC COPYING (TRACER) Attachments for the Series 150, 300, 400, 450, 470, 472, 600 & 620 as fitted to Colchester, Harrison, Milmor, Smart & Brown, Dean Smith & Grace, Willson, Kerry, Broadbent-Schofield and many other makes. A complete 140-page Data Pack with Detailed Operation Manuals and Spare Manuals as Sectional and other drawings.