My second job after highschool (class of 62') was as a mechanical inspector in a local factory. I remember during my interview the manager asking me if I could read micrometers and he immediately tested me so he could see. I got the job, but soon found that a standard micrometer was pretty limited. I bought a 'vernier' and that served the job well for most of my daily line and parts inspection. (In the lab we had other tools.) My particular verniers measure out to 7-1/4 inches and I used them well after I left that job and became a technical illustrator, where I'd often measure small parts.
I still have that vernier and the leather holster it came with. I keep it clean and the markings are still in great condition, and I've never dropped it or scratched it up. About ten years ago I bought a cheap digital (HF) and it serves my needs in the shop for small, precise measurements as my vision in old age isn't what it used to be. Whether measuring 'inside', 'outside', of 'depth' a vernier caliper is the right tool to have.
CWS
I still have that vernier and the leather holster it came with. I keep it clean and the markings are still in great condition, and I've never dropped it or scratched it up. About ten years ago I bought a cheap digital (HF) and it serves my needs in the shop for small, precise measurements as my vision in old age isn't what it used to be. Whether measuring 'inside', 'outside', of 'depth' a vernier caliper is the right tool to have.
CWS
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