Starrett or Mitutoyo are good as suggested, otherwise with digital I just wouldn't with the cheaper brands. Although to be fair I have two sets here that I ended up with as part of bulk lot tool purchases, and I do use them for their convenience as +/- to a measurement when I'm machining something in the lathe. Otherwise I have a pair of cheaper 'nobrand' vernier calipers which I use for my measuring jobs, and if I have something that needs to be accurate I have a set of Starrett micrometers in a lovely rosewood box. They are really quite nice...
Some of the digital verniers have a bit of an issue with repeatability with how you move the slider, if you move them slowly you can sometimes get one measurement but move the slider quickly and you get a different measurement of the same part. It's something I find a little frustrating, and I ended up with a set of measuring standards that I use as consistency testing for the calipers while using them. I select one that's close to what I'm needing to measure, and between measurements I can close them and make sure they are zero'd OK then hit the standard and make sure they are accurate there as well. Its quite surprising how often they fail on one or other measurement and need to be either turned off and on again or rezero'd at max and then closed and rezero'd there to get them back on song. Often it's as simple as leaving them in the sun after being in the shade and that's enough to knock them out of whack.
The more expensive brands just don't have that issue. It's nice knowing that they are good to go straight off...
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