Queen Victoria Hanover 1830

Yep, it's another variety of 19th century card game counter. The article linked to in your other recent thread mentions these pieces, too.

These items are known as "Cumberland Jacks", named after the Duke of Cumberland who appears on the reverse. The "1830" date is fictitious, since Victoria didn't become "Her Most Glorious Majesty the Queen" until 1837. For another example and the story behind the design, see this thread.