Sorry folks... I meant Bianchi... it was late last night and I was up watching my school win their Final Four game... anyways, its an older Bianchi steel road bike.
vpiuva - you hit the nail on the head - that is exactly what I meant. So I am guessing a 27.0 would work? There is no damage to the frame or the threading, etc.
At first I thought the original owner sanded the post down like you do, but the "27.2" stamp was still so well defined I couldn't imagine how he/she did that. Thanks though. Oh, and we learned to not use a "hammer" (it was actually a rubber mallet) the hard way: we slapped the saddle on and pounded away. It was one of those newer fancy, but relatively cheap, carbon saddles, and it broke.
Thanks people, sorry for the misinformation in the post.