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Pollock and MacNab of Britannia Works, Hyde, and later Bredbury, Stockport were machine tool makers
Maker of stationary engines. 
1866 Business established.
c.1872: 16 HP horizontal engine for Greenfield & Stewart’s sawmill, Wellington New Zealand 
1879 Advert in The Argus, Melbourne, 5 July 1879, for Roberts, Morris and Deakin, agents in Victoria for Pollock & MacNab, offering horizontal engines, with cylinders 11"-28" bore, lathes with centres 7½" to 16", shaping, slotting and planing machines.
1888 Two beam engines for Alma Road Pumping Station, Ponders End.
1911 Boring and Surfacing Lathes; Radial drills. 
1911 Manufacturer of Machine Tools for the Railways.
1919 Company reincorporated as Pollock and MacNab (1919) Ltd