which country is it from ? Great Britain ? if it is a 1/2 penny it was made out of bronze not gold. or are you talking about a 1/2 sovereign ? they were made from .917 gold. we need coin photos to see what you have.
if it is a 1/2 penny then it is... KM#793.2 ,1903, Bronze, mintage-11,451,000 grade/value from my 2016 Krause world coin catalog... F-$3.00 VF-$6.00 XF-$20.00 MS60-80.00 without pictures of your coin in focus of both sides I can not determine what your coins grade/value is ?