Hummingbird: A Citizen Tuning Fork Hisonic 3711A from January 1973
Arguably, the two most important innovations in watchmaking are the mechanical lever escapement and the quartz oscillator. The second of …
Category Archives: Citizen
A Citizen Promaster 3802-451732 Y Quartz Diver
This is a Citizen Promaster 3802-451732 Y quartz divers watch, probably from 1988. Or 1998 (see discussion below). I am not …
Citizen Cosmotron X8 postscript
Those of you who read the recent account of the restoration of an early Citizen Cosmotron X8 electric watch may …
Perpetually peripheral: The Citizen Jet Autodater 7
Most automatic winding mechanisms employ a winding weight pivoting about a centrally-mounted bearing. In some designs, the winding weight is …
The world’s first transistorised electronic balance movement: The Citizen Cosmotron X8
The heart of every mechanical watch movement is the balance, whose role is to control the release of power from …
The last watch I would ever own: Citizen Promaster PMT56-2731
Four years before stepping over the precipice and into a horological rabbit hole, I bought the last watch I would …
Citizen Ace Para Water A1307051 from 1962: Part 2
In part 1, we made our introductions and rendered one rather beautiful Citizen Ace Parawater into its constituent parts. Most …
Citizen Ace Para Water A1307051 from 1962: Part 1
Although the title of this blog does not identify its main source of horological inspiration, it is fair to say …
Citizen Super Crystal Date Parawater 150m Part II
Intermission concluded and we rejoin battle, the movement parts having emerged fresh from their bath. I always clean the mainplate …
Citizen Super Crystal Date Parawater 150m AUDS 52801-Y from April 1967: Part I
In reflecting on the impact of Japanese watchmaking through the 1960’s and 70’s it is all too easy to overlook …
