porcelain teapot

This 6 cup teapot is in mint condition and was given to my Mother by her Mother. We don't know if it belonged to her family or what the history is behind it. It is etched in gold leaf on an ivory porcelain base. There are no cracks or any imperfections. The mark on the bottom is very distinct as shown in the pictures. HALL 0188  and made in the USA with the engraved S and a gold shape somewhat like a large backward comma beside it. The number makes me think it is one of a series. All offers will be considered.