Examination of a Campy NR spindle fr a 77 Raleigh Pro has some markings I've never seen before. The spindle is typically marked 68-SS-120, but underneath this marking is +1 - +1.5 Measurements indicate this spindle is 114mm long while two other 68-SS-120 spindles are 112mm long.
Has anyone else seen this or can explain this variation?