Also Mattson's personal financial situation weakened, and following to his death, the company's main creditor sold his shares.

In 1878, after spending about ten years at sea, Mattson became trader in Mariehamn and he opened another shop in Sund.

Until the end of the 19th century Mattson only owned wooden ships; in 1900 he bought majority ownership of two steel-hulled windjammers and one barque.

While Mattson played with high risk by operating with old craft, his business was so profitable that for a short period at the early 20th century he was the biggest shipowner of Finland – although 15 out of the 30 ships he owned between 1880 and 1920 were lost due to serious sea accidents or they were scuttled.

The ship was operated via Helsinki-based company called Ab Naxos Prince which was owned by Mattson family.

[1] The rapid growth together with the 1930s recession led to financial problems; Kone ja Silta could not deliver profit, which frustrated Mattson.

His son Curt Mattson was a deputy member of the board and his two sons-in-law held manager positions.

[1] Mattson died in 1935 after which PYP sold the Kone ja Silta shares to Wärtsilä company which was led by Wilhelm Wahlforss.

[1] Mattson donated significant sum of 1.2 million marks for founding musicology and folk poetry professorship in Åbo Akademi.

It came out just decades later that the professor appointed into the position, Otto Andersson, was Mattson's cousin, and he had formulated his job description himself.

[1] Mattson did not forget his roots; he supported financially renovation of Vårdö church, Åland seamens' mission and schools.