MC W.Rokkor-NL 21mm Advice

I've been shooting some film images with the camera and lens shown below. Readers of my Camerology.com website may remember my fondness for the Minolta X-370 body. The MC W.Rokkor-NL 21mm 1:2.8 lens has been interesting and fun to use and the lens review is published.

But I have a question for other users of this early Rokkor-NL 21mm lens. The focus ring, which is gnurled, turns smoothly, is well damped, and has no looseness. The metal portion of the lens in front of the focus ring, which seems to act only as a non-rotating hood/filter ring, has about one millimeter of slop. Is that normal? If another Minolta user could leave me a comment regarding the normal-ness of this looseness I would surely appreciate it. TIA