Well, it is a demijohn or carboy which is a fancy way of saying is a big bottle used to store bulk liquids, whether wine, acid, food, chemical, etc.
W.T. Co. undoubtedly stands for Whitall Tatum Company. This is the first example of embossing in an applied lip that I have seen on an American bottle.
The lip seems to have molded holes to accept a wire bail closure.
