Elizabeth II (1952-2022), cupro-nickel Fifty Pence, 2009, mint error, reverse struck through, 250th Anniversary of Royal Botanic Gardens at Kew Commemorative, fourth crowned head right, initials IRB below for designer Ian Rank Broadley, Latin legend and raised rim surrounding, ELIZABETH. II. D. G. REG. F. D., denomination FIFTY PENCE below, rev. designed by Christopher Le Brun, Kew Gardens Chinese pagoda entwined with plants, "Kew" italic raised on base of pagoda, dates 1759 2009 as legend (S.H19). An interesting example of a mint error on a very popular coin, one of only a few errors known, graded by NGC as MINT ERROR MS61.
NGC Certification 6031798-032
The Latin legend translates as "Elizabeth the Second by the Grace of God, Queen of the Britons, Defender of the Faith".