Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 148,416 pages of information and 233,868 images on early companies, their products and the people who designed and built them.
of 20-24 James Watt Street, Glasgow.
1913 Advert for 'Kolok' lock washers. Of 80-84 James Watt Street, Glasgow. 
1917 Advert for 'Kolok' lock washers. 'Made and sold in twelve months, 153,000,000'.