JLC Duometre Chronograph Moon - What a Combo!

Launched at the Watches & Wonders 2024, the Jaeger-LeCoultre Duometre Chronograph Moon is watchmaking at its best.

But first, my two Duometre...

First, the Duometre a Chronographe (above)

And the Duometre a Quantieme Lunaire... And then there is the new Chronograph Moon (below)

The Platinum version...

And the Rose Gold version.

Fitted with the new Calibre 391, the Chronograph Moon is a combination of two previous iterations - the Duometre a Quantieme Lunaire and the Duometre a Chronographe, both of which I am featuring here.

I have always liked the Duometre range and as luck would have it, was able to acquire the Duometre a Quantieme Lunaire Limited Edition from the secondary market. This version comes with a white grand feu enamel dial.

Prominent in the Duometre range is the 1/6th second - also known as Foudroyante. Both worked differently in the Quantieme Lunaire and the Chronograph.

What's really interesting about the Duometre range is the movement.

Featuring two barrels, each barrel powers diffrent function - one the complication and the other powers the gear train for timekeeping.

Next up is the Duometre Chronograph...

Again, this is another Limited Edition piece in white gold case and a black dial.

Unlike the Quantieme Lunaire, where the time sub-dial is on the right the time subdial in this case is on the left at the 9 o'clock. The right sub-dial is the chronograph sub-dial with a digital reader to boot.

And unlike the Quantieme Lunaire, the Foudroyante function does not activate until the chronograph is activated. With the Quantieme Lunaire, the Foudroyante function is always constantly beating.

The movement also has 2 regulating organs - one for the chronograph and one for timekeeping. In this way, the accuracy of the timepiece improves as one barrel powers the chronograph and the other the time telling mechanism.

The chronograph is a column wheel (see below)...

As one would expect, the finishing on the Duometre is very well done.

Now back to the newly launched Chronograph Moon - this is a combination of the Quantieme Lunaire and the Chronograph...

Operating under the hood is the new Calibre 391 which I understand was modified from the 381. Whatever the case, it's no slouch and I suspect the movement under scrutiny will stand well on its own.

Between the platinum and the rose gold version, which one looks more appealing to you? For me, I still like the white metal but if only they could have done it in enamel, that would have been an outright winner for me.