
Tiny
I've had the Jaeger-LeCoultre caliber 101 set up as an ebay alert for over a decade, in hopes of acquiring one to perform an in-depth disassembly and review at some point. Today is the first time a complete movement has popped up, albeit in a fully functional watch. While justifiable for what it is, $10,000 CAD is too steep to rationalize spending simply to take it to pieces. For now, here's a candid picture of what once was—and may very well still be—the smallest mechanical watch movement ever mass produced.

Millionomètre
The millionometer, from the French millionomètre, was developed in the watchmaking facilities of the Le Coultre brothers, Antoine and Ulysse Le Coultre, in 1844. Half a decade later, the two would part ways, Antoine LeCoultre agreeing to take on the company's debts and Ulysse setting out to establish a new company.
The millionometer is the earliest known instrument able to measure at the micron scale (one millionth of a meter, or thousandth of a mm). Only two are known to have been produced by the Le Coultre brothers. The one pictured above being the smaller of the pair, now owned by Jean-Maurice Le Coultre and on display at the Espace Horloger in the Vallée de Joux.
Bref, voilà un domaine qui reste un peu dans l’ombre pour offrir toute la gloire aux belles montres que l’on n’aurait jamais pu construire sans ces instruments de mesure si discrets.
To paraphrase, precise tools, despite being critical to the craft, remain in the shadow of the glory of all of the beautiful watches that could never have been built without these discreet measuring instruments.
Movement Design as an Exercise in Artistry
Delightful perspective from Jack Forster on the often unsung hero of truly fine watchmaking, opened with some equally excellent perspective, in cameo form, from John Davis.
Coincidentally, had this article been published prior to today, the MRE reference would have flown right over my head. Not being American and having never served in any military capacity, I was oblivious to the existence of Meal, Ready-to-Eat (MRE) kits, which are standard fare for troops serving in the field, until reading about them in Catherine Price's Vitamania this morning. Engineered to be as lightweight and durable as possible while still delivering the full array of nutrients and energy a soldier needs to perform at peak capacity for a sustained period, they're an apropos comparison to the austere, workhorse movements that power the vast majority of mechanical timepieces.

More Pure
"Almost exactly the same but executed with more finesse, the pocket watch is a perfect tribute to turn-of-the-19th century watchmaking."
A delightfully in-depth look at Philippe Dufour's Grande Sonnerie Pocket Watch No. 1 by JX Su, Sheng Lee, & Richard Lee.
One thing that has perplexed me about Philippe Dufour's Grand Sonnerie in the past, which this article addresses tangentially, is how Philippe would go about letting down the power in each of the gear trains when working on this piece—both in development and later on each time it required service. As it turns out, the satellite ratchet system nested into each of the ratchet wheels is not the full story. The visible ratchet system solely governs winding direction, similar to the way a pair of reversers would operate in an automatic winding system. Beneath these ratchet wheels is another set of clicks, which are responsible for holding the power in the barrels, and it is these clicks that a watchmaker would disengage to let down the power in a controlled manner. It's a masterful solution to a complex problem, in a masterfully complex watch.
An Interview With Watch Designer Giorgio Galli
Logan Baker, reporting for Hodinkee, sits down for a chat with Italian watch designer, Giorgio Galli. A longstanding designer of timepieces within the industry, with clients that have included Swatch, Citizen, Ebel, Seiko, and Movado, Galli is currently operating as Design Director for Timex.
It was interesting to learn through this interview that Galli was the designer behind the Swatch Stoplight back in the 1990s.