Digital Calipers

You get what you pay for. Being from a tool and die back ground, all my measuring tools are Starrett or Mitutoyo. They cost a little more but they are quality. I have no knowledge or experience of the brand you have posted the link to, but judging by the price the country of manufacture is China. Nuff said..

Have a calipers with hard plastic faces used for measuring gemstome diameters, during the cutting process. Just the old vernier scale, dead simple to use.

My instrument would be 40 years old, British made.

With ancients, with irregular flans, it's use would be pointless with the accuracy that the caliper provides. Don't see the need for it's use with machine struck coins, unless a fake is suspected.

when I looked for calipers - and I agree that they are an essential part of collector's kit - I couldn't see the advantage of digital over the sliding scale (which some people call a Vernier, but I think that a true Vernier is a step up from a caliper). Secondly, batteries are a pain; and those small "hearing aid"-type batteries are ridiculously expensive.
The best calipers, in my opinion, also have a probe, for measuring the depth of a cavity: useful when checking the wear on my tyres.

I have bought some Chinese digital ones I had adapted to a telescope focuser for a way to repeat back to the same focus point. They sure don't hold up very well, so the old adage - you get what you pay for certainly applies to these items. I found the case they come in would turn them on when I closed the case there by running the expensive watch batteries down overnight. watch out for that issue.

Jeg's ottomotive has composites...colorful,too.

, Engineer!

I got the ones in the first post. Solidly made.