The seat tube length is slightly irregular due to the shaped tubes.  Taken in a straight line center to center is between 56.5cm and 57cm.  It is also about 56.5cm along the top tube. No dents. No bends.  27.2 seatpost.  130mm rear spacing. 1" head tube headset. Sold by Trued Wheel in conjunction with Vintage Velo Venice.