Austin Hopkinson and Co
of Delta Works, Audenshaw.
1905 Company founded.
1934 Private company.
1958 Lease a factory at Penygroes
1960 Slusher haulage for mining. Sixty years experience. 
1961 Mining engineers, specialising in Pikrose compressed air, electric and hydraulic hoists, scrapers and haulages. 370 employees. 
Sources of Information
- The Times Jan. 23, 1958
- Mining Year Book 1960. Published by Walter E. Skinner. Advert p399
- 1961 Dun and Bradstreet KBE