Fun and games with search engines. Entered coastbilt 8" outside caliper with micro adjustment screw add -digital -micrometer
so of course, the first things are micrometers, digital, electronic displays, and no way to say "nope, nope, nope, nope, not even close".
Anyway I managed to break the adjustment thingie. I gather when they said "micro adjust" they really mean "micro". Wondering if parts are available. The Company is listed as suspended by the state of California.
Me thinks I'd be best served by keeping an eye open at the hock shops.