It's a Pfister Bernini. I just bought 2 for both my bathrooms, and aside from the tank bolts being of poor design, they're good quality and flush great. The only pictures I have are mid-renovation.
I think this pfister toilet can't be purchased in the USA, but in Canada. I would check the Duravit called Starck 3 two piece toilet. I have the one piece version. It is great and it flushes nicely with water sense.
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calarina