Yes, as amanico mentioned, the "family name" (ultra-thin) does not correspond at all to the actual 12.1 mm of thickness!

Master Ultra Thin Tourbillon Moon

By: quattro : November 22nd, 2025-08:20

The Jaeger-LeCoultre Master Ultra Thin Tourbillon Moon , ref. Q169242J is almost never talked about. Rightfully so? What do you think ? The pink gold case measures 41.5 x 12.1 mm and the watch is powered by self-winding caliber 983 which features a tourbi...

Jaeger-LeCoultre

Master Ultra Thin Tourbillon Moon

There is a confusion between the family name ( Ultra Thin ) and the thinness of the watch ( which is not Ultra Thin with more than 12 mm high ). A serious looking watch, accurate, but which never sang to me.

I agree with you on all counts!

Go for a good old 5100. :))))

Oh, yes! This one doesn't come even close! It's night and day, really.

;-)

It is a beautiful Jaeger-LeCoultre but as already pointed out not an Ultra Thin watch, it is not even Extra Thin even if it does have a Tourbillon.

Yes, as amanico mentioned, the "family name" (ultra-thin) does not correspond at all to the actual 12.1 mm of thickness!

I have never understood the allure of a moonphase 'readable in both hemispheres'...

Just so that you can have an idea of how the humans of the other hemisphere see the moon...

That is just sublime.

Believe it or not, I could do that in my head : )

Yes, it definitely is!

Agreed.

Hahaha... :)))

Beautiful but a tad too big for a dress watch.

It’s a bit large indeed.