Hacking seconds: what the function does, how to spot it on video and why a photo proves nothing

Watches Movements & Tech
1

Many QC albums show the crown pulled out — and then you are just guessing. This thread explains hacking seconds (seconds stop / Sekundenstopp): what the function should do, how you see it on video, and what a photo cannot prove. Basics: glossary and arrival check.

[[PHOTO: Schema einer Krone in drei Positionen — eingeschraubt, Handstellen, mit stillstehendem Sekundenzeiger markiert]]

Editorial summary, not independently verified.

2

In short:

  1. Pull the crown to the time-setting position (on screw-down crowns, unscrew it first).
  2. With hacking active, the seconds hand stops.
  3. After pushing in (and screwing down), it runs again.
  4. Purpose: to stop the seconds while setting the time, not to “prove accuracy”.
3

Newbie question: is a sharp photo with the crown pulled enough, or do I really need a video?

4

A still shows at most the crown position. Whether the seconds hand really stops or was just photographed “by chance” between two ticks can be seen only in a short clip (2–4 seconds on the seconds hand, crown pulled). That belongs to the arrival check, not to a single JPG file.

5

What hacking is not:

  • no proof of calibre identity
  • no substitute for timing over hours
  • no water-resistance test

For flyback and other chronograph functions see flyback chronograph. For hand winding vs automatic on video: see also the arrival check.

[[PHOTO: Beispiel-Videostoryboard mit drei Frames — Sekundenzeiger tickt, Krone gezogen und Zeiger stoppt, Krone ein und Zeiger läuft]]

6

And if the crown is stiff — does that automatically mean “no hacking”?

7

No. Stiffness is a separate topic (thread, gasket, position). For hacking, only one thing counts: the seconds hand stops and starts reproducibly on video. Blurry video → ask for it again, don’t guess.

8

Short version:

  1. Hacking = seconds stop with the crown pulled to the time-setting position.
  2. Only a short video proves start/stop; a photo doesn’t.
  3. No proof of calibre, rate or WR.
  4. Unclear clip: ask for a new video, don’t speculate.
  5. Arrival check and glossary remain the internal references.

Editorial summary, not independently verified.

9

Got it — from now on always the 3-second clip on the seconds hand.