There is a chapter on bayonets from Geo Salter in
Suppliers to the CS, which is a bit too long for an internet forum post, but here is a blurb about the frim from College Hill Arsenal (Tim Prince):
"George Salter & Company was a Birmingham manufacturer of spring steel and balances (scales) that was started in 1760 by Richard & William Salter. Upon their deaths John & George Salter took over the business and by the 1790s they had become one of the leading employers in West Bromwich (about 5 miles NW of Birmingham), continuing to manufacture springs and balances, and adding bayonets to their manufacturing capacity. For the next 200 years the company continued in business under the name of George Slater, and during the late 18th Century and 19th Century they were one of the premier bayonet makers to produce bayonets for the British Board of Ordnance (later War Department), as well as the commercial and export trade – especially to the North & South during the course of the American Civil War. During the latter part of the 19th Century, Salter returned to their original specialty and continued to expand their spring steel, spring and weighing and balance business. Salter actually continues to do business today as a subsidiary of Avery Weigh-Tronix, who acquired Salter in 2000."