Movements

The beating heart of every automatic watch is its movement, a complex system made up of tiny components that provide the watch's timekeeping functionality.  Unlike conventional quartz (battery-powered) watches, automatic watches are powered by the kinetic energy of the wearer's wrist and can easily be identified by the smooth-sweeping motion of the seconds hand. 

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Miyota Caliber 90xx

Miyota (Citizen) is one of the world's largest manufacturers of watch movements. The 9000 series movements are the Japanese answer to the venerable Swiss ETA 2824-2 and its variations, offering both high accuracy and superior reliability. It is also thinner than many other automatic movements, allowing for a thinner watch construction.

Technical Specifications
24 jewels
28,800 vph, 4Hz
42 hour power reserve
3.90mm thickness
Accuracy from factory: -10s ~ +30s / day
Accuracy from Nodus regulation: -8s ~ +8s / day
Hacking (stop seconds) and hand-winding
Quickset date (9015), No-date (9039)

Used In
Avalon (9039), Contrail (9015)


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Seiko (SII)

NH35A

Seiko is one of the most respected and horologically-important watch companies in the world. The NH series of movements can be found in a number of legendary Seiko dive watches and is widely used by many watch brands due to its affordability and reliability. Although undecorated and sparsely finished, the NH35A is a dependable workhorse movement that provides a good balance between budget, performance, and reliability.

Technical Specifications
24 jewels
21,600 vph, 3Hz
42 hour power reserve
5.32mm thickness
Accuracy from factory: -20s ~ +40s / day
Accuracy from Nodus regulation: -10s ~ +10s / day
Hacking (stop seconds) and hand-winding
Quickset date

Used In
Retrospect, Trieste (retired)