I went through the docs on the Gemini scale. Excellent scales read to +- .1 grain. Not so hot scales read to +- .2 grain. I strongly suspect a typo error in the specs.
I have a set of check weight standards and I'd sure verify that before I accepted the data in those docs.
You gotta die of something.....It may as well be something that you like!
Loving the Harley idle....potato, potato, potato.