The tanker on this stamp was identified by Watercraft Philately in ESSO CAMBRIA, a photo on this web-site gives most probably after which the stamp was designed, the only thing is missing is the mast on the fore castle with the toplight, a designer mistake.
http://www.aukevisser.nl/uk/id163.htm#esso_cambria_5 third photo.
Built as a tanker under yard No 785 by Verolme Verenigde Scheepswerven, Rozenburg near Rotterdam for Esso Petroleum Co. Ltd., London.
10 May 1969 launched as the ESSO CAMBRIA.
Tonnage 127.158 grt, 253.962 dwt, dim. 347.8 x 51.9m. Length bpp. 329.2m.
Powered by one Verolme General Electric steam turbine, 32.000 shp., speed 16 knots.
29 September 1969 trials.
November 1969 completed.
At that time she was the largest vessel built on a Dutch yard.
Did not sail very long as a tanker already in 1981 was she sold for scrap by Esso.
01 October 1981 she arrived at Masan, South Korea and was scrapped by Dongkuk Steel there.
Sierra Leone 1996 300Le sg2639, scott 1922h
Source: Register of Merchant Ships completed in 1969. Blauwe Wimpel.