Sri Lanka Navy’s 60th Anniversary commemoration Stamp and First Day Cover was ceremonially issued by HE the President Mahinda Rajapaksa during the colour awarding ceremony held at Colombo Light House premises on December 09, 2010, in the presence of the Secretary to Ministry of Post & Telecommunication Mr. Asoka Jayasekara and Post Master General Mr. MKD Dissanayake.
December 09 is also celebrated as Navy Day in Sri Lanka.
The current Sri Lankan Navy was established on December 09, 1950 when the Navy Act was passed for the formation of the Royal Ceylon Navy. The roots of the modern Sri Lankan Navy dates back to 1937 when the Ceylon Naval Volunteer Force was established, which was renamed and absorbed into the Royal Navy as the Ceylon Royal Naval Volunteer Reserve during World War II. The current name Sri Lanka Navy was constituted in 1972 when Sri Lanka becoming a Republic and the introduction of new constitution.
The pennant number of the watercraft depicted on stamp is not visible but I think it is one of the Fast Attack Craft of the Sri Lanka Navy.
Many thanks to my blogger friend, Mr. Ravindra Ratnapala for sending me this stamp and the same on envelope too.
Source: Wikipedia, navy.lk