Swed303 is a collection of Pinus sylvestris by Lars-Åke Larsson and covers the time span AD 1672-1870. The data is measured from logs of a demolished house - Kaptensudden at Västanvik, Nämdö. (Kaptensudden = the Captains point) These logs seem to be taken from another place than the island of Nämdö. They do match Nämdö data but they have their own characteristics. They are probably taken from another part of the archipelago or from the mainland. The house is described at http://www.cybis.se/forfun/dendro/houses/index.htm
The original collection was released to the ITRDB on 2003-01-23, but replaced with an updated collection in April 2006 with multiple radii for each log.