This standard establis es the methods and means for the verification of mechanical chronometers with divis on values of 0.1 s and greater. This includes the verification of chronometers that have trailing hands.
NC 90-11-03-1984 history
1984NC 90-11-03-1984 Metrological Assurance Mechanical Chronometers with División Valu of 0,1 a and Greater. Verification Methods and Mean