Fine weights - weights of accuracy classes F2 and F1

Fine weights - class F1
Weights for the verification or calibration of weights of class F2, as well as weights for use with scales of accuracy classes I and II.

Fine weights - class F2
Weights for the verification or calibration of weights in class M1 and possibly class M2. Also for use in important commercial transactions (e.g. precious metals and precious stones) with scales of accuracy class II.