The definitive 50p design in the Isle of Man between 1971 and 1975.  The design was tweaked slightly for the 1976 release featuring a long ship on the Isle of Man map used until 1979. 
 
This coin is dated 1975, in circulated condition taken from sealed bag. 
 
*This coin is no longer in general circulation and is thicker than standard 50p coins issued after 1997*
 
Obverse: Arnold Machin Queen Elizabeth Portrait 
Reverse: depicting a sailing Viking longship (designed by Christopher Ironside)