Antique German Water Jug, selling 1800s

This is a rare NASSUA SELTERS salt glazed water bottle from 19th century western Germany.
These earthenware jugs were used to import natural mineral water that was sourced from wells in Selters, Hesse, Germany. Water from these wells has been well known for thousands of years because of the high concentration of sodium bicarbonate, or natural soda water. That's why the jugs were made so thick, because of the pressure of the contents.
These clay jugs used corks held in place with a wire trap, very similar to those that had been developed for champagne bottles in the early 1600s. The top of these jugs have a series of incised rings in the clay, just below the rim (see photos) that were used to hold the wire selling traps.
These straight-sided jugs were developed around 1850, and were exported to many countries, including Great Britain and America. The advances made in glassmaking by the end of the 1800s brought an end to the use of these ceramic jugs, which dates this item to between 1850 and 1900.
This jug is in very good condition. There is a small chip in the lip of the jug, almost certainly because of the pressure of the contents. It is very difficult to find one of these jugs that doesn't have a chipped lip.
There is a grey colored streak running the length of the bottle (see photos), probably from laying on its side on some basement shelf, or perhaps even on the ground, for a hundred years. It would have taken many decades for this type of discoloration to develop on the surface of the glaze.
The item is incised on the front with the name “SELTERS NASSUA” in a circular trademark, and there would have been the image of an eagle as well, which has faded over time. Also, there is incised on the side of the jug the name and number of the well where the contents were drawn.
The bottle is intact and completely original, measures 12 inches tall, about 3 1/2 inches in diameter and weighs about 3 pounds.
This is a wonderful archeological item, a fine antique display, an interesting conversation piece or a lovely gift for those interested in history.