When I visited Rejuvenation in Portland, I saw this wonderful early 20th century reproduction sink for sale. I am not sure of the exact timeline for sinks like this. They were originally porcelain enamel on cast iron — and I would guess they spanned the 1910s through the 1940s. This “Liberty” reproduction pedestal sink from St. Thomas Creations [update, link now gone, but I am going to hunt for another source. Darnit!] — is made of vitreous china. Even so – the sink looks like the real deal – gorgeous – and would be a wonderful choice for a pre-war retro renovation bathroom – for a bungalow, four-square or romantic revival bathroom, for example.