Australia 1863 Sydney Half Sovereign VF
A respectable VF30/35 grade, well above the PCGS F12 graded coin seen below. You can buy that coin by clicking on the image (opens in new tab):
As for rarity – a VF25 coin on PCGS’s registry has only 9 coins graded finer – https://www.pcgs.com/cert/84385938.
Notice the die fill due to oil or other contaminate that has left the E in Sydney looking like an F, while the T in mint is almost an I.