Hello jumpinjo, welcome to the forum. One of the other moderators moved your post here, and I've edited the subject for you, to better reflect on the coins you're actually talking about.
The "Zeus looking guy" sitting on old British pennies and halfpennies is actually female; it's "Britannia", the personification of Great Britain.
They are all fairly common coins, in Britain at least. Exactly how much they are worth would depend on condition, but even in very high grade, these coins are not particularly valuable.
Don't say "infinitely" when you mean "very"; otherwise, you'll have no word left when you want to talk about something really infinite. - C. S. Lewis