Highly unique bi-metal Gold & Titanium coin minted by the Pobjoy mint on behalf of the government of Gilbraltar. 

The coin is minted to commemorate the 160th anniversary of the uniform penny post and contains 26.3 grams of .9999 fine gold and 5.4 grams of .990 titanium, making it the world's first blue coin. 

This coin has a maximum mintage of 999.