The Q&C Blog

The Rare Seiko 31-7000: A Vintage Electronic Wa...
Among vintage Seiko collectors, the Seiko 31-7000 stands out as a rare and fascinating timepiece. Unlike most watches of its era, it is neither manual winding, automatic, nor quartz. Instead,...
The Rare Seiko 31-7000: A Vintage Electronic Wa...
Among vintage Seiko collectors, the Seiko 31-7000 stands out as a rare and fascinating timepiece. Unlike most watches of its era, it is neither manual winding, automatic, nor quartz. Instead,...

Patek Philippe 5140 Perpetual Calendar: A Colle...
The Patek Philippe 5140 Perpetual Calendar remains a benchmark in high horology since its 2006 debut. Its 37mm case (available in white, yellow gold, and platinum) houses the ultra-thin Caliber 240 Q movement...
Patek Philippe 5140 Perpetual Calendar: A Colle...
The Patek Philippe 5140 Perpetual Calendar remains a benchmark in high horology since its 2006 debut. Its 37mm case (available in white, yellow gold, and platinum) houses the ultra-thin Caliber 240 Q movement...

Purple Mountain: A Forgotten Corner in Vintage ...
In the quiet corners of horological history, nestled between the rise of Shanghai’s iconic brands and the global dominance of Swiss timepieces, lies the story of Purple Mountain (紫金山) — a...
Purple Mountain: A Forgotten Corner in Vintage ...
In the quiet corners of horological history, nestled between the rise of Shanghai’s iconic brands and the global dominance of Swiss timepieces, lies the story of Purple Mountain (紫金山) — a...

How to Remove a Quick Release Spring Bar
Quick-release spring bars make strap changes effortless—no tools needed! But sometimes, a regular spring bar is the better choice. Here’s why: When Should You Switch to a Regular Spring...
How to Remove a Quick Release Spring Bar
Quick-release spring bars make strap changes effortless—no tools needed! But sometimes, a regular spring bar is the better choice. Here’s why: When Should You Switch to a Regular Spring...

A Concise Guide to the Valjoux 72C and Vintage ...
The Valjoux 72C - produced from 1938 to 1974, this manual-wind chronograph was a marvel of engineering, combining Chronograph with a triple calendar (day, date, month)—all in a wristwatch-sized package. One of the...
A Concise Guide to the Valjoux 72C and Vintage ...
The Valjoux 72C - produced from 1938 to 1974, this manual-wind chronograph was a marvel of engineering, combining Chronograph with a triple calendar (day, date, month)—all in a wristwatch-sized package. One of the...

Gallet Commander: A Vintage Chronograph Unlike ...
The Fateful Yahoo Auction Discovery It all began with a poorly lit listing on Yahoo Auctions Japan. The photos were fuzzy, the description vague—just "Vintage Chronograph, Excelsior Park movement." But...
Gallet Commander: A Vintage Chronograph Unlike ...
The Fateful Yahoo Auction Discovery It all began with a poorly lit listing on Yahoo Auctions Japan. The photos were fuzzy, the description vague—just "Vintage Chronograph, Excelsior Park movement." But...