Citizen Cosmotron X8 postscript
Those of you who read the recent account of the restoration of an early Citizen Cosmotron X8 electric watch may …
Previous articles
Three into one: Seiko 5 Sportsmatic Deluxe 7619-7050 from November 1965
Two and a half years ago, I won a Yahoo Japan auction for a lot of seven watches, all but …
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 …
SEIKO ウオッチ機械台セット
Anyone who has experience working with a variety of different watch movement calibres will be familiar with the benefits and …
Loose-end trivia: date disk alignment and the Seiko instruments NH36
In sweeping up a few loose ends from the past few months of behind-the-scenes activity, this brief entry documents a …
Namokimods Nautilus Self-Build
This past year has been a particularly busy one in my day job, leaving less disposable time to spend footling …
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 …
A faux milspec 6309 revisited: Seiko 6309-8010 from 1976 and 1977
One of my longest-lived watches is a grab ‘n’ go beater, a bastardised aggregation of disconnected parts that came together …
Lift angle: Seiko Business-A 8346A and Bell-Matic 4006A
If you have ever used a timegrapher to measure the timing of a mechanical watch, you will have come across …
A Seiko Champion 850 Alpinist J13079 from May 1963
In 1959 Seiko released the Seiko Laurel Alpinist, a recreational sports watch designed specifically to meet the needs of Japanese …
Perturbations and the act of observation: A Seiko 6139-8040 from November 1974
In classical physics, a foundational principle is that it is possible to assign precise values simultaneously to all physical properties …
Adventures in Amateur Watch Fettling 