Each continued to operate separately after the merger. Crescent, Delaware, Empire, and Enterprise made vitreous china sanitary wares. Equitable made tableware and hospital ceramics. The goal of the merger was to. Produce sanitary wares similar to those made in England. Makers mark from Trenton Pottery Co. On back is clear, also marked with Vitroware Co. Seattle on the top. Overall the condition is very good. No major defects, some staining as shown.