Yes it is mine: http://philadelphia.craigslist.org/bik/4662507839.html
My old bike was an undersized Bianchi mountain bike re-made into a hybrid that I then gave to my wife.. cro-mo lugged frame, etc. She added 20+ pounds of accessories and it's still better than any bike I've had since.
It likely has the size stamped into the bottom bracket shell, or you can measure from the BB center to the top of the seat collar.
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