Can you help to identify these frames, bikes or parts?

Posted this track bike build up as a roadie a while ago:
http://www.lfgss.com/thread44162-34.html#post2396259
Nobody knew anything.

Now i've removed the paint maybe someone has an idea?
Details:

• 531 Reynolds
  
• Found in Holland
  
• had a campy 165 pista crank
  
• seat post size 27.0
  
• campy track ends (and fork-drop outs)
  
• was probably standard blue before respray
  
• bb was a Sugino 1.37 x 2.47
  
• Nothing stamped on the bb, inside the head tube, on the lugs
  
• Seat tube stamped (upside down) with 'Reynolds 531'
  
• Fork stamped with 'Reynolds 531' (not upside down)
  
• Left side of the fork stamped with '0 5 76'
  
• Right side of the fork stamped with '420 5 6'
  
  

any thoughts?