See Michael Mark, Antique Indian Chess Sets, page 27, figures 16 & 17. Similar abstract sets were acquired by the India Museum from the Paris Exhibition in 1867 and are subsequently now in the Victoria and Albert Museum collection. Michael Mark attributes these to the Tatta and Sind region of Northern India (present day Pakistan), made between 1855-1867. The pieces were typically made in either ivory, wood or beads, decorated in plain red and green, and some with additional gilt heightening. They were not strictly for Muslim use but the term has become used as a generic label for this abstract type.