A few months ago, we asked our Man In Paris, David Chokron, who previously brought you the Minute Repeater Sound Off, to do something a little interesting, a little provocative. We asked him to take a week on the wrist with seven watches — most, if not all, of them with high claims of performance — and rank them according to how well they kept time at the end of a week’s worth of daily activity.

And so he went out and got for us the following — a Jaeger-LeCoultre tourbillon, a Franck Muller tourbillon, an H. Moser with Straumann double hairspring, an Omega with co-axial escapement, a Roger Dubuis double tourbillon, a Zenith Espada with El Primero movement, and finally, a 35-year-old Rolex.

In Part 1 of the video, shown below, David takes us through the watches and his methodology. Let us know what you think is going to be the final result!

UPDATE: View Part II here!

* This video in no way seeks to be a guide to chronometric performance in market-available timepieces, timekeeping accuracy being a quite separate issue from what governs timepiece chronometry (ie, isochronism in the regulating organ).