Honk you photos above are much better, but better photos show up how worn these coins are.
Notice that King George has a lot of wear on him, these coins are VG to near Fine.
For Fine, you would expect a fully visible crown band across his portrait. VF the central diamond should be sharp
For EF the pearls either side of the diamond should be sharp and discerned. Should be some lustre
For AU, it should be a full lustre with no visible wear.
For UNC it should dazzle your retinas.
This is the portrait of George at a bare VF/high Fine level - now compare that to yours. If anything its probably a more Fine level - but its a South African half crown this coin and they have a notoriously high level strike on the King.
Still you can see the detail level is much higher than your pieces.
This is EF - AU, so you can see your coins fall well short of this mark.
Condition is crucial and sadly with the overheated silver price all except the 1901s are really worth melt only.
Loving Halfcrowns. British and Commonwealth coins 1750 - 1950 and anything Kiwi.
If it's round, shiny and silvery I will love it.