An 80-year-old chocolate bar dating to the coronation of George V in 1937 is to sell at Hansons Auctioneers.
It's housed in a presentation tin bearing photographs of the new king and queen.
The bar is intact, although it's unlikely to be edible.
Spokesman Edward Rycroft told the Burton Mail: "Who would have thought that no-one would give in to the temptation to eat the chocolate?
"It may be well past its sell-by date now but we are certain there will be an appetite for this in the saleroom!"
It's expected to bring in around £60-100 ($86-143) when it crosses the block on May 19.
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