I would buy a Tesa. They are identical to the Brown & Sharpe or Etalon calipers but they have a thumb wheel and this makes all the difference. Long Island agrees - this is the Cadillac of calipers.
I just bought one to supplement the four others I already have - don't ask - and it is, by far, the best of the lot. It reads in 0.001" increments but has dots in between the tic marks to read 0.0005". I checked mine with gage blocks and it is balls on accurate. Hardened jaws, smooth as silk, repeats every time.
If you have the money, a Tesa depth base is nice to have.
Does the Tesa only come in 6"? I have an 8" Mitutoyo and find that to be the perfect all around size for my work. The Tesa does like nice. I may get one even in 6"
How much did you pay for it if you don't mind? I see they're going for $175 and up. It's nice that the Tesa is dead nuts, but calipers are not really super precision tools.
Like all calipers, the amount of pressure used will determine accuracy. I can get repeated measurements with my Mit digimatic 8 with light, even pressure but it will never measure .0623"
Ebay has a listing for new Etalon 6" dial calipers with the depth base for $149.00 ($5.00 S&H), which is a great deal.
Amazon is selling them for $184 w/o the depth base. The Ebay listing is Brown&Sharpe but it's an Etalon. New in it's sealed package and paperwork. TESA Etalon B&S
I couldn't resist, so I bought one from the Ebay seller. Returns are accepted, but if this is a new caliper, I don't see any problems.
There are two left. http://www.ebay.com/itm/322270746493?_trksid=p2057872.m2749.l2649&ssPageName=STRK:MEBIDX:IT
I needed a back up in case my Mitutoyo quits on me. (6 years still going strong).