Chris was making the point that a regular non digital caliper is just
as accurate as a digital one without the issues of dead battery etc.....
With my glasses off I can read a standard Caliper to .1mm(1/10 of a MM)
while I must resort to my glasses to read to .01MM (1/100 of a MM)
Plus a regular caliper is on topic while a digital one may not be
BOB FREITAS
MILL VALLEY, CA USA