The type on the right is the dpm camouflage version of the 1960 pattern combat smock issued from around 1966 until the advent of the item on the left , the 1968 pattern combat smock. The original 1069 pattern smock was olive green and was a modified version of the 1953 pattern combat smock that was based on the US M43 system of clothing and was designed to replace the Battledress worn by British troops during the 1930's and 40's.