I feel like it's been forever since I had a good swing. This morning I went to my favourite spot - and was not disappointed.
I think this is a mood ring, it has an interesting design.
1917 King George V Half Penny
1806 or 1807 King George III Half Penny
Whilst I can't see a date, I've put this as the 1806 or 1807 half penny based on weight, size, shape of the monarch and the position of the writing above the monarch's head.
This is where the date should be.
1916 King George V Half Penny