Every single one of our watches undergoes an extensive quality control process at every stage of handling, before/after certification, and ultimately re-checked prior to shipping. Our watches must adhere to our strict standard of quality and consistency. Not only are our watches visually examined, but they are also examined internally to ensure accurate timekeeping within +/- 10 seconds which is far better than the recommended calibration. Furthermore, they are re-tested for water resistance right before shipment.