JLC Master Ultra Thin Perpetual Review

Key Points from the Discussion

• The 39mm size is considered perfect for versatility, suitable for both formal and casual wear. The gold case with a cream dial is particularly admired, and the single-pusher setting system for all perpetual calendar functions makes it user-friendly despite lacking a power reserve indicator.
• The watch features a safety mechanism that prevents calendar adjustments when the movement is actively changing the date, a thoughtful design element for a perpetual calendar.
• The steel version with a black dial is also highly regarded and offers a more accessible entry point to the reference, though the gold version is often favored if price were not a factor.
• The Master Ultra Thin Perpetual is challenging to photograph accurately, with its true beauty best appreciated in person. Both gold and steel versions are excellent choices.
• While intelligently made and versatile with excellent wrist presence, the readability of the subdials was a drawback for some potential buyers.
• The year indicator, while technically part of a perpetual calendar, is questioned by some for its necessity and impact on dial symmetry.