This is a 1975 Gibraltar gold coin with a denomination of 50 pounds. It is uncirculated and has a fineness of 0.917, with an AGW (actual gold weight) of .471 ozt. The coin was minted to commemorate the 250th anniversary of British-sterling being introduced.  On the obverse it features a bust of Queen Elizabeth II and the reverse features Our Lady of Europa.  It has been certified by NGC with a grade of PF 69 ULTRA CAMEO and a certification number of 6894001-021.  This coin has a very low mintage with there being only 750 coins being made.  This coin is a top pop with NGC with only 4 coins of this type being given a grade of PF 69 UC and none being graded higher.