The Timepiece Journal » horology

Authoritative answers to the most common questions about mechanical watch manufacturing — components, materials, precision tolerances, jewel bearings, heat treatment, assembly, and the 13-day quality inspection.

Authoritative answers to the most common questions about GMT, the International Date Line, Beijing Time, leap seconds, and how world clocks work — and how it all connects to luxury watchmaking.

Clear answers to the most common questions about time zones — who invented them, how they work, what the International Date Line is, and how they connect to the watches we wear today.