there is not much to say, an unexpected, refreshing and superbly done piece from GO - if you open up a dial, do it like this!

The guillochage here is engraved into the brass dial top plate, thus is renders light completely differently than if one would engrave the same pattern in a softer metal like gold or silver.

'Excellent' automatic movement Cal. 36-02:

I had to rush out of the meeting to solve an urgent issue for the PuristS' Watch Binge, thus I could not properly clean the back side.
Best,
Magnus