2014 Vincent Van Gogh Sunflowers 1888 National Gallery London 1 oz Silver Coin. A numismatic masterpiece made of 40g pure 999 silver coin which honor the great holland painter Van Gogh. Issued by Niue Islands, the coin represents fourteen sunflowers made in 1888, probably his most famous painting. Official licensed product by The National Gallery in London with mintage extremely limited to 500 pieces worldwide (300 for the National Gallery & 200 for international sales). Credit / debit card.