This Admiralty chart is a 1987 edition of Outer Approaches to Bangkok Harbour, Ao Udom and Ao Sattahip, Thailand.
It is a colourful and interesting piece that would make a statement framed and hung on the wall.
It has been plotted by the previous owner - a sailor and you can see his/her route in pencil.
Old charts are hard to come by as once out of production, retailers are required to return stock to be replaced with new editions.
measures approx 72cm across by 114cm high