How old was David Pearce when he designed the reverse side of the new British pound coin in 2015?

The British one pound (£1) coin is a denomination of the pound sterling. Its obverse bears the Latin engraving ELIZABETH II D G REG (“Dei Gratia Regina”) F D (Fidei defensor) meaning, “Elizabeth II, by the grace of God, Queen, Defender of the Faith”. It has featured the profile of Queen Elizabeth II since the original coin's introduction on 21 April 1983. Four different portraits of the Queen have been used, with the latest design by Jody Clark being introduced in 2015.

The reverse of the new 12-sided, bimetallic pound coin was introduced on 28 March 2017. It was chosen by a public design competition. The competition to design the reverse of this coin was opened in September 2014. It was won in March 2015 by 15-year-old David Pearce from Walsall, and unveiled by Chancellor George Osborne during his Budget announcement. The design features four emblems to represent each of the nations of the United Kingdom (the English rose, the leek for Wales, the Scottish thistle, and the shamrock for Northern Ireland) emerging from a single stem within a crown.