Pretty sure the 'Coolant Proof' line that are silver in color, Carbide jaw versions and the Solar powered units are not targeted for counterfeiting as they are not as common, and are a nicer calipers to use IMHO. Also, there are a lot of subtle variations of the basic model, some without the thumb wheel, some without the data link, that the CN don't bother to try and replicate, they only focus to copy the fully loaded model.
Granted none of these are going to be the cheapest you can buy (saving pennies and buying a new Mitu is sort of oxymoronic), but if you are just concerned about getting 'authentic' ones from Amazon or some other supplier with poor inventory protections, than this will increase your odds by a lot. If you are worried that you got a fake, the most definitive way is to open it up and look at the new AOS inductive pickup on the back of the circuit board, as the current line of Mitutoyo calipers use a much more complex multi-zone sensor than the clones as it is picking up readings from multiple areas on the inductive strip. The CN units pickups and the inductive strip on the body are dead simple in comparison, so if you can easily see the raised inductive areas on the strip and it isn't multiple rows of independent offset blocks but just vertical stripes, than it is a fake. Opening one up isn't too difficult (screws are under the back label) and if done carefully will not affect the unit. I should have taken a picture of the sensor itself when I had one open, but just looking at it should be enough to convince you it's legit, as even to the untrained eye it is clear there is a lot going on there.