Finland Issued set of four stamps on September 07, 2005 on Icebreakers. These are the official Maxi Cards. Thanks to my swap friend, Mr. Holger Kaufhold for these cards. 
The four icebreakers depicted on stamps are Urho, Otso, Fennica and Botnica. The ships represent the last three generations of Finnish icebreakers. Each stamp shows the name and building year of the icebreaker, and also the name and building year of the sister ship. The four stamps illustrate the 24-hour operation of the Icebreakers in - evening, night, morning and day respectively.
The oldest of the vessels is the icebreaker Urho. Otso was built in 1986. The ship is more modern in terms of technology and in particular more cost effective than Urho. Fennica, built in 1993, is the first multipurpose icebreaker in Finland. In the winter the multipurpose icebreakers sail in domestic icebreaking duties.
In the summer they have offshore duties in the service of international oil and gas industry. The newest of the ships depicted on the stamps is Botnica. It was built in 1998 with advanced multipurpose icebreaker technology.
Source: filahome.nl
