.
The lugs are shortened (compared to other K3), such that shaped straps form a continuous seamless connection flowing out from the caseband.
A closer look. The metal lug and leather strap seem to be 'fused' together. 
Note the picture above, the shaped-straps hugged the circumference of the caseband leaving no pockets in between. Normally at both 6 and 12 o'clock positions, as the straps may rub against the caseband, and after a while, abrasion marks would appear on the straps.
With the cut-through-scallops, the high tangential rub-points are removed. With less contact areas, the straps could swing smoothly without the screeching sound 
. 
The 1.5 mm sapphire per specification is anti-reflective (AR) coated on the second surface. Unsure of the reason/s of not coating both sides of the sapphire as it is still reflective at a certain angle.
The Sarpaneva logo was printed on the second surface of the sapphire crystal too. If the logo is a symmetrical monogram instead of text, it extends the flexibility of Korona to be worn with crown pointing inward.
An image of wearing the Korona with the crown facing in. Preferably on days other than around the new and full moon.
Otherwise the Korona RG would look interesting with an upside-down moonphase.
The whole glorious crown is high-gloss polished.
Observing carefully the crown is shaped like miniaturized case!
The concave bezel with the scalloped edges are perfectly aligned with the caseband. That's explain for the new screw pattern with more screws on the caseback (picture of caseback is at the bottom of this post).
The Dial, Hands & Moon Phase(Face)
A pair of unique microblasted frost arrow-hands with the 'fat bellies' as counterweight complementing the textured 18K moon-faces.
The beautifully thin (0.3mm) skeletonized dial resembles the tree grill were laser-cut. Total there are 260 slots, which require to be individually hand filed and polished, on both sides of the dial, to prevent any unwanted reflection from burrs causing uneven visual effect.
First question, many would ask for reason about Sarpaneva's K3 sombre and melancholy moon-face.
An explanation by Stepan:
“You know, here in Finland, we are not a very extrovert kind of people. Maybe it has to do with our past history, as well as the cold combined with the extremely long winter nights and the extremely long summer days. You have to learn to remain in balance. So everyone here floats around with an aura of slight melancholy – I don’t know how else to describe it.
So for me a smiling moon was out of the question, also because a Moonphase smiling all the time is too much like those yellow smiley faces (emoticons) they put in emails.
This Moon has an aura of aristocratic melancholy; with a bit of indecision as to whether he is basically happy or sad in nature. The expression of the Moon on my watches just ‘is’ – same as the Finnish people here.”
A peek at an angle, the edges of all the slots are free of burrs. Indeed require skilled laborious effort. That's not over yet as the rotor mounting is of the same tree grill design. It is double the effort!
While reading the press release material, Stepan mentioned that creating the moonphase is as complex as conceptualizing the moonphase mechanism.
The challenge is having four levels of elevation on a 0.4 mm thin 18K gold material.
Curious to find out more, I prepared the above picture with indication of each layer and emailed to Haute5 to enquire more from Stepan about the processes.
Stepan later sent over a few pictures to share with all of us the processes of creating a moonphase disc.
This copper version, which will serve later as an electrode, is then cleaned up and ‘fine-tuned’ by Master Engraver Mr.Heikki Hartikainen.
After touched up by Mr.Heikki Hartikainen, the surface of the copper electrode is microblasted to create the texture (as shown above). 
Next is to electro-etch the contours into a steel-pressing block, thus creating a negative image of the face, called die.
A close up view of the negative image on the die.
A trial stamped piece for Mr.Heikki Hartikainen to know where to touch up on the die.Note there are no eyeballs on the trial stamped piece, read on.
Last but not least, the eyes are modeled by hand into the negative image and the whole is finished by the Master Engraver and diamond polished before undergoing hardening, followed by yet another polishing before proceed to stamp out the 18K gold moonphase pieces.
Movement
Before flipping over to see the movement side, a picture of the 10.1 mm side profile of the luxurious Korona RG.
18K gold see-through caseback with 2 screws per cardinal location securing the 3-piece case.
The base caliber is A10 from movement manufacturer, Soprod S.A. It is then further modified at the Sarpaneva workshop and fitted with the moonphase mechanism designed and built by Sarpaneva. The uniqueness is the easy moonphase adjustment through the crown instead of typical push-pin on the side of the caseband.
The crown has 2 setting. The first pull-out is for the moonphase adjustment while the second pull-out is for hour and minute.
Though the press material mentioned the entire movement is re-finished, it is not easy to observe through the skeletonized dial and rotor, but the perlage done on the bridges and main-plate is visible.
The rotor is also decorated with a 18K gold moonphase disc which besides for aesthetic reason, it also functional to be the rotor mass as the density of gold is high which many companies have done. More importantly, is to balance the design with both the front dial and back caseback has the presence of the moonphase
Unable to test the rate of the watch as it does not have a second hand and it would be unfair to estimate.
Buckle & Straps
The Ardillon buckle comes with crocodilian leather shaped (at the lug ends) straps .
The buckle is brush-finished 18K gold with a glossy pin, similar texture scheme as the case, just that for the buckle, the bigger surface area is brushed while on the case the smaller lugs are brushed.
Surprisingly the buckle is not monogrammed but marked with the signature scallop cutoff.
WristShots
Size is about 160mm /6.3 "
Just nice for my wrist size.
Observe how the straps flow from the lugs. Just right and the lugs are not protruding outward.
Another picture will be clearer.
Last hole for me, Sarpaneva may wish to check the wrist size. This straps are too long for my small wrist.
This is an important picture, the lugs are just behind the straps and not jutting out which is unsightly.
Wonderful lugs design!
