Watch accuracy expectations have gotten complicated with all the certification claims flying around. Here’s what those “+/- seconds” specifications actually mean.
Accuracy Standards
Automatic watches typically run within -4 to +6 seconds per day when new. COSC certification guarantees -4/+6 seconds daily. Masterchronometer certification achieves 0/+5 seconds.
Factors Affecting Accuracy
Probably should have led with this section, honestly. Position affects rate significantly. Temperature changes timing. Magnetic fields disrupt balance wheels. Activity level impacts winding consistency.
Improving Accuracy
Regular service maintains precision. Proper storage between wears helps. Demagnetization fixes magnetic exposure. Regulation adjustments fine-tune timing.
Realistic Expectations
Most automatics stay within 10 seconds daily. Quartz accuracy far exceeds mechanical. Accept mechanical charm over precision.
