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The patina is rather even and not distracting, decently sharp case, non-luminous dial and hands which is always preferable imo than having to deal with flaking tritium, the 35.5mm larger hidden crown cases are among my favorite Constellations.
First of all - congratulations on your new watch.
The case is indeed sharp.
The original crown for a 168.004 is almost entirely hidden.
IIRC Crowns were replaced as standard in a service.
The original crowns are no longer available.
There are two types of replacement crown ( shared with the 168.010)
1. The knurled cylindrical shape.
2. The knurled domed shape.
Both stick out from the mid case.
You appear to have the second type.
It is possible a previous owner had it replaced at service because the originals are damned near impossible to use.
Pic of original for reference
p.s.
If you were referring to hidden crown Constellations as ‘jumbo’ this is a misleading term used by nefarious dealers.
They are very slightly larger diameter than a dogleg or lyre lug but the term ‘jumbo’ is reserved for the significantly larger Constellations predominantly sold into Japan and the far east.
I’m very happy with the watch, this is the most beautiful patina I ever owned and the case seems to be not polished at all, caseback is also very sharp as well as lugs.
It certainly warranted the additional photos.
👍
You will notice that the .004s have some quirky variations if you look closely at the bezel you will see a difference to mine.
With a 20,00xx serial yours is an early .004 with and SGR case.
Mine, shown above, is a very late .004 with a 24,27xx serial and with a CB or KB case.
(It also has a 564 engine and a brickwork Observatory)