I don't remember the ring around the tub but I am sure that after 4 kids bathing in it there was a some kind of ring. Oh yeah, I forgot that mother would gather the kitchen chair around the tub and drape blankets on them to help keep the heat localized around the galvanized tub. She had to heat the water on the stove for hot water. We did not have running water or indoor plumbing at that time. The water was hand drawn from a well so water was not wasted. Oh the not so good old days. Us kids did not know we were dirt poor. We ran around barefoot most of the year and had one pair of shoes a year for school and a couple of dresses.