This is nice looking vintage Mavic 630 crankset.  I consider this item usable, nut please notice in the pictures there is a hairline crack in the drive side spider. I have included super close up pictures from the side and from the back.  This is not a crankset that should be raced or hammered on.  It is good for a restoration and casual vintage rides.  Use your own discretion and use at your own risk.  Sold by Trued Wheel in conjunction with Vintage Velo Venice.