A 1928 British West Africa George V tin-brass two shilling will headline a sale of world coins at Heritage Auctions.

The lot is expected to reach $20,000-25,000 in the January 10 sale.

The 1928 two shilling is the rarest coin in the British West Africa series

It's the rarest circulated coin in the British West Africa series, with only four known surviving specimens - two of which remain on the private market.

The other coin sold for $11,000 in 2014. It's of a significantly lower grade, with the present lot described as being in Mint state.

Other lots in the sale include a 1791 Sierra Leone British colony silver proof dollar, which is valued at $12,000-15,000.

The coin is described as the greatest Sierra Leone rarity, with only five pieces ever struck.  

Heritage comments: "One of the most coveted proof crowns ever produced, this is the first time one has been sold publicly in at least a decade…

"It is extremely difficult to place any sort of number on this coin, but we fully expect that a new record price for a Sierra Leone coin will be set with this coin. It is sure to be one of the highlights of whatever collection it ends up in."

Click here to check out our fascinating selection of coins for sale.

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