-Did I miss something? You fitted a scale, all right - but no "sort Vernier" in the normal sense of the word,
as there's no subsidiary scale as far as I could see...

"A vernier scale is visual aid to take an accurate measurement reading
between two graduation markings on a linear scale by using mechanical interpolation;
thereby increasing resolution and reducing measurement uncertainty by using vernier acuity to reduce human estimation error."

You can fit a subsidiary scale to easily get down to 1/20th of your scale graduation like:

Click image for larger version.  Name: Close_up_of_vernier_scale.jpg  Views: 180  Size: 18.1 KB  ID: 39112

From:https://en.wikipedia.org/wiki/Vernier_scale

Might seem a bit picky - but I just can't stand hearing electronic calipers being called "Digital Verniers" any more...

Cheers
Johan