Answer:
The pre-decimal equivalent to the modern 10p coin was 2 shillings. During Victoria's reign, a 2 shilling coin called the Florin was introduced in a preliminary step to decimalize the currency, that plan failed but the Florin was a popular coin and continued to be minted up until decimalization. The first 10p coin was the same size and metallic composition as the Elizabeth II florin and until the 10p coin was reduced in size to the present both coins circulated because they had the same value.