it is not part of the scaleSilly question: Is it part of the scale? Does your scale work?
What kind of scale is it?
Any chance you can post a picture of the ones you have?I have gages that are made like the part in the picture. They are old enough to be called 'go-not go' as in will go and will not go. The end with the two diameters could be used for alignment.
F. Guffey
Clearly it is a Kaniffiling pin