The Vintage Fashion Guild website has a "label resource" at https://vintagefashionguild.org/label-resource/ . This is an alphabetical index of pages, each linking to a list of labels under its letter. Some pages have as many as 50 brands, or even more. Brands that I looked at included Frank Usher: their page showed labels from the 1950s, 1960s, 1970s, and 1980s, plus one fake, a knockoff from India.
I thought I'd list the labels I've photographed, in case it's any help in adding to such resources. I can't vouch for the dates of any of my items, but I'm sure there are experts who will be able to give good estimates. If you want to use any of the photos on your own site, please let me know via my contact form. Below, there's a photo, with label, of each item for which I had a label. The little hand to the right of the brand name links to its original blog post. The WordPress link http://www.chromophilia.uk/blog/category/labels/ also points at those posts, plus this one.
Agnès b ☞
Arrow ☞
Benetti ☞
Colorpoint ☞
Eastex ☞
Elegance ☞
Falabella ☞
Fosby ☞
Frank Usher ☞
Gerry Weber ☞
Heather Valley ☞
His Lordship ☞
Jacques Vert ☞
Jake ☞
Klaus Rheiner ☞
Kuku ☞
Nina Boutique ☞
Oakland ☞
Ravi Sehgal ☞
Tian Bao Gong ☞
Tracery ☞
Wallis ☞
Wow! ☞