Yup.
The New Langwill Index, which is actually old and out of print, has a sentence or two about a lot of manufacturers. The publication year (1980) preceded my efforts in music history. When I did want it, it was out of print and goes for around $150+ US. There is a newer revision (1993) that is co-authored by William Waterhouse.
Langwill died in 1983. Waterhouse died in 2007.