March 1911. "Perco" Bench planer.
May 1913. Bench milling machine.
1914. Improved Mortisers.
Holbeck Engineering Works, Leeds. (1912 Advert).
Wortley Works and Whitehall Tool Works, Leeds.
1894 John Perkin, managing director.
1914 Advertising the 'Fifteen Guinea Miller'
1917 Advert for 'Perco' presses, millers, hacksaws and grinders 
1927 Advert for hacksaw machines 
Sources of Information
- ↑ Mechanical World Year Book 1917. Published by Emmott and Co of Manchester. Advert p197
- ↑ Mechanical World Year Book 1927. Published by Emmott and Co of Manchester. Advert p95