Editor Jens Koch | WatchTime

Jens Koch

Editor

Even as a young child, Jens Koch was fascinated by technology. After leaving school, he considered studying engineering, but decided to pursue his second passion, literature and language, and studied German and media studies. In 2001, these two interests came together again when he began testing watches for Chronos magazine. Understanding and explaining every detail of a movement and complication is still a challenge that appeals to him.

Articles by Jens Koch

Chronographs

Design King: Updating the Rolex Datejust - FEATURE

The new Datejust that Rolex unveiled at Baselworld 2016 scarcely differs from the Rolex Datejust II. The similar design characteristics set Rolex watches apart from other brands. Learn more details in this feature article from WatchTime's Special Design Issue 2017.

10 minutes

Jens Koch

Mar 13, 2020

Sinn

An Inside Look at the Various Technologies Pioneered by Sinn - FEATURE:

How do you protect a wristwatch from shocks, scratches, extreme temperatures and water? Sinn has discovered innovative solutions and integrated them into most of its watches. The developmental work was costly, but the watches remain accessible. Discover how the brand does it in this feature from our May 2019 issue.

13 minutes

Jens Koch

Dec 13, 2019

Time Zones

Naval Gazing: Testing The Panerai Luminor 1950 3 Days GMT - WATCH TEST

WatchTime puts both the Panerai Luminor 1950 3 Days GMT wristwatch and the brand’s P.9001 in-house movement to the test in this feature, accompanied by Nik Schölzel's stunning original photos.

9 minutes

Jens Koch

May 16, 2018

GMT Watches

Dynamic Duo: Testing the Rolex GMT-Master II

Often referred to as the "Batman", because of its notable black and blue bezel, we test here the first version of the Rolex GMT-Master II ever to sport this color combo.

4 minutes

Jens Koch

Nov 10, 2015

TAG Heuer Monaco-Breitling Chrono-Matic watches

Watch Reviews

Comparison Test: TAG Heuer Monaco vs. Breitling Chrono-Matic

In this Watchtime test feature our writers pit modern versions of two iconic 1970s chronographs — the TAG Heuer Monaco and the Breitling Chono-Matic — against each other in a challenge of retro sports watches.

5 minutes