without a mint mark ? the coin is identical in shape , titles of king George "Georgivs" V to any 1/2 sovereign and 1 sovereign coins , but the size is much smaller than 1/2 sovereign size. any information is needed.
There's no such thing as a ¼ sovereign from Great Britain. Maybe as a pattern, or from another colony, but not from Great Britain. And, it's pure guesswork without an image.