WPW  ,

White picked wrack . GP V, Grey picked wrack flax . D, Dreiband (Threeband) . PD, Picked Dreiband flax . LD, Livonian Dreiband . PLD, Picked Livonian Dreiband . SD, Slanitz Dreiband . PSD, Picked Slanitz Dreiband . The last-named (SD and PSD) are dew-retted qualities shipped from Riga either as Lithuanian Slanitz, Wellish Slanitz or Wiasma Slanitz, showing from what district they come, as there are differences in the quality of the produce of each district . The lowest quality of Riga flax is marked DW, meaning Dreiband Wrack: Another Russian port from which a large quantity of flax is imported is Pernau, where the marks in use are comparatively few .