Hello. I hope this is in the right section. I need help identifying this coin which i believe is a full stater early England. Weighs 5-83 grammes.Any help greatly appreciated.
This is similar to yours http://www.acsearch.info/image.html?id=280011 Description CELTIC COINAGE Britain No.: 1 Schätzwert/Estimation: CHF 600.- Catuvellauni. Gold stater 40/20. Remains of laureate bust as cruciform ornament. Rev. Horse galloping to r., shield below. 5,77 g. Mack 135. DT 9498. Blanchet p. 480. Good very fine-almost extremely fine.
Pish answered while I was typing. I was going to suggest the Ambiani tribe but she seems to have nailed it with Catuvellauni. Here's another similar Catuvellauni coin, from CNG's archives: Compare to yours:
Figure how much distilled water the coin displaces and get volume of the coin. Do some math and find the density. Then find out how much that density deviates from the density of pure gold. There is some margin for error but It will give you a good idea of the percentage. I did something similar here. https://www.cointalk.com/threads/my-new-almost-ancient-sort-of-gold-coin.263750/
They really were not so dark. They had lots of history written. See 1995 book: After the Flood by an English fellow named Bill Cooper. I found his perhaps controversial common sense really down-to-earth. They even had a history that was written at the same time as Julius Caesar's. And one way way way before...