It’s been roughly 9 months since I bought my ‘grail-watch’, the Korona K1 from the Finnish watchmaker Stepan Sarpaneva. So enough experience to sit down and write about this watch that’s been on my wrist almost permanently for almost 9 months. My Sarpaneva Korona K1 was my first watch from an independent watchmaker and also my most luxurious/expensive watch ever. When Stepan Sarpaneva told me the watch that I ordered was ready, I booked a ticket to Helsinki to pick it up myself. Here you can read the report of my trip to Helsinki. Now it’s time for a review to share my experiences of owning and wearing a Sarpaneva Korona K1. In May of last year it was finally time. The months before had been an intense period. Of course a decision like this was not made overnight, so long lists of potential watches had to be narrowed down. Or maybe the decision was not so difficult, it was just me having difficulty with spending so much money on a watch.?When my decision was final, the deal was made and upon Stepan Sarpaneva’s phone call that my Korona K1 was ready, a ticket to Helsinki was booked. There’s nothing like buying your watch from the watchmaker who made it with his own hands and who designed it! It’s his creation that touched me in such way that I desperately wanted this watch. Wanted it so bad that I sold quite a few other watches to raise the funds. Ad - Scroll to continue with article The bare facts. Maker: Sarpaneva Model: Korona K1 Limited: number 10 of 10 in total of the first generation K1 Introduction: 2008 Age: 9 monthsSarpaneva Korona collectionSarpaneva released the Korona collection during Baselworld 2008. The initial collection existed from the K1, K2 and K3. Later the K3 Black Moon was added. The Korona collection is, like all Sarpneva Watches, made in Sarpaneva's atelier in Helsinki, Finland.First impressionsThe Sarpaneva Korona is a very elegant watch that wears very comfortable. I was amazed by the comments people made. Of all watches I've owned, and believe me I used to be quite a flipper', the Korona K1 received the most spontaneous reactions, positive of course! Even people, who usually never noticed a different watch around my wrist, asked me about it or simply complimented me on my watch. Of course this is not the reason to buy a watch and I never even thought about it, but this pleasantly surprised me.Experience – wearingBefore I tried a Sarpaneva Korona on my wrist I was afraid it would be slightly too big, due to it's diameter of 44mm. This is mainly because most of my watches with a diameter of 44mm had to leave the building' because they where just not comfortable on the wrist.?At Baselworld 2009 I met Stepan Sarpaneva and he let me try a Korona K2 (same size as the K1). By trying it, I discovered that the diameter of his watch was no problem at all. To be honest it felt great and really suited my wrist perfectly.Although the diameter is the same as that of my old Panerai, the Korona wears completely different. The big difference between my old Panerai PAM00001 and the Sarpaneva Korona is its thickness. The Panerai is 15mm thick and the Sarpaneva Korona is only 9.6mm thick. That's 1/3 less!Besides that the Korona is also quite light when compared to my other (large) watches. With only 83 grams, including the alligator strap and tang buckle, it feels quite light around my wrist.In the past 9 months my Korona K1 has been on my wrist at least 95% of the time. The only moments I took it off, was when I had to use hammer or drill around the house, when under the shower and during my recent vacation in India.?After all this time I can say with confidence that the Korona K1 is the most comfortable watch I’ve ever owned. The pure pleasure of wearing this watch and looking at it it’s just superb.Experience – reading timeAnother thing that slightly worried me was it's legibility. Why? Well, before coming a decision I read everything I could find online.?A few remarks where made by forum members, who actually had never seen a Sarpaneva Korona in the metal. The concern was that the partially polished hands would negatively influence it's legibility. However other forum members owning a Sarpaneva Korona always refuted this concern.Now I've worn my Korona K1 almost daily i can assure everyone who worried about this, reading time on a Korona K1 is absolutely no problem.Even in a movie theatre during the movie, it's possible to read the time by looking in the right angle.?OK, I must admit that usually I need to look at several times before I know the time. This has nothing to do with legibility it’s just me looking at the watch and enjoying it's beauty while I totally forgot to look for the time. Sounds familiar, or am I the only idiot.Case Case: Sarpaneva 3 piece case Diameter: 44mm Thickness: 9.6mm Waterproof: 50 meters Crown: Sarpaneva crown Crystal: sapphire with anti reflective coating and SARPANEVA printingThe Sarpaneva Korona models K1, K2, K3 and K3 Black Moon use the same case. It has a diameter of 44mm and is only 9.6mm thick. The new Korona K1, released in September 2009, has a slightly smaller case with a diameter of 42mm.The sapphire crystal has a multi layer anti reflective coating, applied only on the inside. This is to prevent the AR coating from getting scratched when time passes by. The name SARPANEVA is also printed on the inside of the crystal.Movement and modificationsBase movement: Soprod A10 Jewels: 25 Power reserve: 42 hours Shock protection: Incabloc Vibrations: 28,800 p/h Date adjustment: quick setModifications: Sarpaneva Rotor Customized mainplate Sarpaneva date discFor the entire Korona collection, Sarpaneva uses the Soprod A10 as base movement. This movement is designed as competitor to the ETA 2892 and 2824 and virtually all dimensions are the same. One big difference is that a basic Soprod A10 has a factory finish of a higher standard than ETA and like the ETA calibers, it is available in ebouche. Sarpaneva modifies the Soprod A10 to his own demands. Besides the polishing and finishing that Stepan Sarpaneva does, there are some modifications that are necessary for the design. For instance, a hole is laser-cut in the main plate. The position of this opening?is?exactly behind date window and date wheel, to make it possible to look through the date window, date wheel and mainplate and see the oscilation of the balance spring.The movement ring is attached to the mainplate and both parts are fully DLC treated.?In the case, the movement is fixed with movement holders designed by Sarpaneva. The photos above show a movement without DLC treatment and with the DLC coating. In one of the photos you can see the Sarpaneva movement holders.?The skeletonized date disc is typical for Sarpaneva. The date numbers are laser-cut in a stainless steel disc of only 0.15 mm thin.?The photo shows a generic Soprod date wheel next to his date wheel.Parts Hands: Sarpaneva Korona hands Dial: Sarpaneva Korona K1 dial Rotor: Sarpaneva Korona K1 rotorMaking and finishing the hands, dial and rotor is very time consuming. The hands are first laser cut and than black polished by hand. The black polishing of the hands is something that takes approx. half a day per hand. After the hands are black polished, the part closest to the middle is sand blasted. The end-parts of the hands remain black polished. The layers of the dial and rotor are laser cut, at least that's the start The rest of the work is done by hand again. First step for the watchmaker is to file the small carrots' and sharp edges away. Than all edges, and there are many, will be polished to ensure all edges have the same angle to ensure a nice reflections. Again time consuming handwork.The dial of my K1 has 188 holes' – 164 holes' in the dial and 24 in the index ring. Can you imagine this takes a little while? Oh and this is just the dial, there's also a rotor.?The rotor undergoes the same procedure and is equipped with 2 white gold masses. The dial layers and rotor are only 0.4mm thick.StrapThe strap is a hand made alligator strap with some light padding. The ends are rounded to match the shape of the case and are 22mm wide.?It comes with a tang buckle with SARPANEVA engraved in it. It looks like the buckle Swatch uses, however it's feels much more solid. Usually I choose deployant clasps over tang buckles. This buckle however is something else. It's very easy to use and you can tuck in the strap easily.CufflinksThe best addition to a watch.More info on the Sarpaneva Watches website.