Based out of Helsinki, Finland, Stepan Sarpaneva has has built a very unique identity for his brand, his designs and even his own likeness. The son of jewelry designer Pentti Sarpaneva and nephew to renowned local product designer Timo, Stepan's design skills were easily influenced. At a young age he found a fascination for repairing and building steel items such as bikes and cars. Soon after he grew to love the precision art of watchmaking. Completing watchmaking school in Finland in 1989, then onto the WOSTEP program of Switzerland, Stepan started his career in the industry in 1994 where he worked for names such as Piaget, Parmigiani, Vianney Halter and Christophe Claret. Establishing his own brand in 2003, Stepan now makes his own timepieces in an old cable factory in Helsinki.

As a wonderful design concept for the Korona K0 series, Stepan Sarpaneva launched a set of 4 new models expressing the strong "brutally honest" seasons of Finland. "In autumn Mother Nature explodes in color, but in winter she totally freezes over. In spring she slowly awakes, and in summer she doesn't sleep at all". As a tribute to these contrasting seasons, the Korona K0 Seasons four model series is launched using distinctly different glowing dials made in collaboration with James Thompson of Black Badger Advanced Composites. Pictured above is the colorful Autumn model.

Each dial is two part, with the base treated in Black Badger's Ambient Glow Technology in a different color for each season, then two stainless steel wire framed grates with the lower in different colors depending on the model. For Autumn, the luminous material is purple as is the grate. The Winter color for both is blue, and the Summer green. For Spring, the grate is an anthracite color while the luminous material glows in teal. Pictured above is the Winter model.

The cases for the Korona K0 Seasons are 46mm wide and 11.2mm thick done in different finishes of stainless steel. The Summer and Winter models are done in silver toned finish with a combination of a highly polished case and a brushed case back. The Spring model is fully done in DLC treatment. The Autumn, being as colorful as it already is, has a DLC bezel, while the sides of the case are done in a yellow gold toned titanium nitride treament, which is an extremely hard material. Pictured above is the Spring model.

The movement housed inside is the self-winding Soprod A10 caliber that is rhodium plated with a perlage finish. The movement contains 25 jewels, has a rate of 28,800 bph and a power reserve of 42 hours. The Soprod A10 is certainly a solid workhorse movement and very reliable. Only 20 of each of the different seasons will be made in the series, for a total of 80 pieces.

Another beautiful piece introduced by Sarpaneva is the new version of the Korona K3 Northern Stars with black enamel dial. Previously available in white enamel, the new black dialed variation is going to be availble in the 18k red gold signature case. The deep black enamel dial is contrasted by blue and silver toned steel grates forming the indexes. The 6:00 moon phase indicator has Sarpaneva's angry moon on display, actually using 2 seperate moons, one of white gold and one of red gold. The movement is also a base Soprod A10, modified for the moon phase complication.