If I remember correctly they are 6207 with the ug free hub (I do have a nos 6208 for a freewheel in a 28 hole with a nos mavic tubular rim as well) cassette is a 6 speed, from memory it's 12-21. The bike they came off seems to have seen very little riding and was used occasionally for time trials so rims are in good condition. They have either conti giro or Vitoria tubs fitted - would need to check which.