Vintage Fenton blue opalescent hobnail salt or pepper shaker

This is a blue opalescent hobnail shaker made by the Fenton Glass company. It is approximately 3 1/4 inches high and has no lid lids. The glass is is good shape, but one of the hobs in the top row has a flat top, probably dinged and possibly diamond filed (note picture with pen tip pointing to the hob). The shaker is otherwise undamaged. Use it to replace a broken shaker in your old salt and pepper shaker set.