The golden age of Brooks Bros. is history.
I would say that the golden age ended around 1977 when it discontinued its bespoke department and closed its suit factory in Long Island City. I have been told by a couple of clothing professionals that its RTW suit at that time was the best on the market.
The company changed ownership a number of times, and it decided to stop manufacturing its own suits and shirts. Instead, the goods were made by outside factories, e.g., Martin Greenfield, Southwick, and the late Norman Hilton. In the golden age almost all its tailored clothing and shirts were made in the USA by either its own factories or outside factories working on Brooks specs.
See the recent article on Brooks Bros.'s tailored clothing on
www.filmnoirbuff.com.
Nonetheless, there are still some remnants of its former glory.
E.g.,
1. Its neckties are made in its Long Island City factory. I believe that this is its sole factory.
2. Some of the shirts are still made in the USA at a factory in the south.
3. The shoes are still excellent. Adlen, Crockett & Jones, Alfred Sargent, and some Italians.
I think that the Brooks of the past is history. We will never again have an "all-American" clothier like Brooks which manufactured most of its own goods. (The upper floors of 346 Madison were initially used as workrooms!) Almost every clothier today carries goods made outside the USA whether it be Canada, Italy, China, or Macau.
There is some hope for the future that Brooks might return to being a manufacturer-merchant. Brooks bought Southwick, and it is building a state of the art factory with the viewpoint of turning-out a quality product in both RTW and MTM. Some Brooks people told me that they have big plans for Southwick. Therefore, stay tuned.