I found the photo on the internet, and she is the same craft as depict on the stamp.
Built as Landing Craft Infantry (Large) by Bethlehem Steel Shipyard, Hingham, MA, USA
19 January 1943 transferred to the United Kingdom.
6 March 1944 commissioned in the Royal Navy as HMS LCI (L)-125. Under command of L.T. Charles R. Parker and a Canadian crew.
Displacement 216 ton light, 389 ton full load, dim. 158.5 x 23.3 x 5.11ft (draught loaded)
Powered by two sets of 4 MG diesels, four per shaft, 1,600 bhp, twin variable pitch propellers, speed 16 knots.
Range by a speed 12 knots, 4,000 miles. Fuel capacity 130 tons.
Armament: 4 single 20mm guns one forward, one amidship, two aft and two 50cal machine guns.
Crew 23.
Capacity for 6 officers and 182 enlisted, and a cargo capacity of 75 ton.
Took part in the D-Day landings took on board the Highland Light Infantry of Canada A Co. and 1st Platoon D Co.
During the landings on Juno Beach was she holed by obstacles in the bow causing her a list of 15 degree, which had to be corrected by counter floating of ballast tanks.
04 August 1944 decommissioned by the Royal Navy.
14 March 1946 returned to US Naval custody.
1946 Struck from the Naval register, and transferred to the USA State Department for disposal.
13 February 1948 sold, fate unknown.
Tanzania 1994 200s sg2001, scott1275d
Source: http://www.navsource.org/archives/10/15/150125.htm