Bowers XT Série Notice D'utilisation page 4

NOMENCL TURE & SETTING INSTRUCTIONS (Inch)
HOW TO RE D...
Inch micrometers above the 3/4" range are graduated in 0.00025" divisions.
Inch micro micrometers below the 3/4" range are graduated in 0.0005"
divisions. The sleeve has a datum line, and the thimble is graduated as
illustrated below. The sleeve is graduated in 0.025" divisions and one
complete revolution of the thimble is equal to 0.025". To read the
instrument, read the size on the sleeve to obtain the tenths and
hundredths, and to obtain thous and tenths of thous read the number on
the thimble which lines up with the datum line.
Inch micro micrometers have an included vernier scale on the sleeve,
graduated in 0.0001" divisions. To read the vernier scale, read the vernier
graduation that lines up with the thimble graduation.
Examples are illustrated below.
In the illustration above In the illustration above
the micro micrometer reading the micrometer reading
would be 0.6258" would be 0.75075"