Extra large 1963 Canadian penny with roman warrior on it?

Answer 1

1. British, not Canadian

2. Standard size for a pre-1971 British penny, not an extra large cent.

3. The goddess Britannia, not a Roman warrior.

Assuming that at least the date is as stated, your coin is common among collectors and retails for about a quarter.

Answer 2

A large 1912 Penny with a man holding a trident would be a British 1912 bronze Penny with King George V on the obverse and the seated figure of Britannia holding a shield and trident on the reverse.