Leevan, This item is a Victorian coin weight. Coin weights were produced by the Royal Mint as well as private company's (like Avery, who are still going I think?) and were, I believe sold to merchants, shop keepers etc as a way of checking is a coin handed to them was real and not an underweight forgery. Simply by putting the Sovereign on a set of scales with a brass sovereign weight on the other end you'd know if it was a genuine 7.98 gramme sovereign. Nowadays of course digital scales are far more accuarate. Because the weight you post has a young head Victoria on it, I would imagine it dates from around 1840/50. They are collectable and I have a little experience selling Georgian coin weights but I have not sold a Victorin one, so am unsure of it's value.