does anyone know aht these two silver coins may be? are they worth bidding on at £5? the sell wrote this description: You are bidding for a Half Farthing dated 1844 slight nick on the edge. And two other coins unsure if they are a 1 1/2 farthing dated 1839 measures12mm dia, And a 2 farthing dated 1838 measures 13mm dia, Both smaller coins appear to be silver, All used but in nice condition