I think Crescent Bathrooms may still be going as a company. Going through the advertisements of my grandfather's company, C.E. Warren & Co. Ltd., I found several household products which have long since disappeared. Some have a status as antiques and command high prices from collectors. Look-alikes of the water heater pictured here still survive in many countries, however.
David, please may I request a gallery for "Household products of the early 20th century"? This Crescent Bathroom ad dates from 1920, so is a hundred years old. I wanted to mark its centenary before 2020 disappears.