Can anyone recommend a good vernier caliper...

I'll second what mtnGhost just mentioned! 
When I ran my custom shops, I used Mitutoyo calipers that a friend hooked me up with.. 
They were fantastic quality! [Honestly, I had always just used Harbor Freight versions] 
When I asked him where he got them, he told me just to use Grainger.. 
Too many places [especially online] will knowingly or not - sell clones / fakes.. 

For any gamblers out there - [Like me] I also did come across these..
Amazon seems to actually carry the real deal amazingly enough.. 
2 options, 1 for a few bucks more - including authenticity / traceability 
But, from all of the reviews - People are guaranteeing them to be good to go.

https://www.amazon.com/Mitutoyo-Advanced-Absolute-Digital-Caliper/dp/B00WMKUUAQ#customerReviews 

🙂👍 

Sam -
 
I've got a Phase II 6" which (for airgun work) seems to be just as accurate as the 8" Mitutoyo solar one I have. Of course I basically use it to measure for o-rings and such, not down to 1/10,000 of an inch.

I was given these by the relative of a machinist who had passed away. I think the Mitutoyo is about 5 times the price of the Phase II.

1552225736_5360791755c8515c84fd642.02812042_20190310_094313.jpg

 
You definitely don't want a vernier caliper. What you need is a good digital caliper that is accurate to at least .001

The digital versions will zero or switch between metric, standard and fractions of an inch with the touch of one button.

Here is an excellent model that I own myself for less than $28 https://www.amazon.com/gp/product/B001AQEZ2W/ref=oh_aui_search_asin_title?ie=UTF8&psc=1

I've owned mine since May of 2016 and have used it daily since. It's as good today as the day I got it.


 
I always thought they were called vernier caliper RULERS....I notice all the listing not saying ruler just vernier caliper ?


They are "misusing" the term. You basically have 3 types. Vernier, Dial and Digital. You don't see many true vernier calipers anymore.

There's a good reason you don't see them anymore and it's the same reason you don't see people navigating with a sextant. There are better ways now.