Gitman Vintage is an American shirt company that does things the old-fashioned way.
In this case, that idiom refers to the fabrics used, cutting and sewing techniques, button selection, finishing techniques, cutting patterns, and almost every other step of the shirt-making process.

Like an alligator, Gitman Vintage–or Gitman Bros., as the company is also known–is a living representative of a long-gone age. It is one of the rare examples of a brand making new products to the standard of much-sought-after mid-century vintage items.
If you have come across Gitman Vintage, chances are it is one of the brand’s vibrant or eccentric pattern shirts. But it also maintains a core collection of simple shirts designed to be worn often and for many years.

Along with making probably the best Oxford shirt on the planet, Gitman Vintage makes the best warm-weather button-down shirts money can buy. The best example of the latter is the Cotton Linen Dobby Stripe Camp Collar Shirt.