I thought I would throw this out there just to see. I am replacing a 1942 American Standard 1 piece toilet - 10" rough-in. It is in good shape but would need new fill valve and a good power wash would make it like new. It has a good flush. The date under the lid is December 7, 1942. If it was one year earlier it would be historic! I hate to throw something out that someone could use or collect. I doubt it is rare but I also doubt there are many still around like it. I can send a photo if anyone is interested. I am in the Philadelphia area.