A formal link exchange generally refers to an internet based system that is set up to facilitate these sorts of link exchange. There are some well known link exchange systems on the web that are easily found via a web search.

Excellent, large, 16 16-1/2, white, chenille, Christian Dior, short sleeve shirt with Jordan Marsh Florida, Men's Store label. "Christian Dior" is embroirdered into the shirt in white just above the Jordan Marsh label. I don't know the age, but the Jordan Marsh Flordia stores ceased operation in 1991. The collar points are slightly long, so my best guess is late 1970s-mid 1980s. There is no fabric content label and no washing instructions. It is in fantastic condition. No stains or tears.