Brian MacDonald Antique Rugs & Carpets has dated this Antique Baluch Sofreh Rug to the 1880s.
Please take a look at the two detail photos taken of the lower left and right corners of the camel-hair ground where you will see the weaver had originally planned to leave the border in plain-weave but then started to insert knotted-pile! Charming!

My thoughts on which Baluch tribe made this sofreh suggest the Salar Khani tribe who occupy parts of northern Khorassan province in north-eastern Persia.
Rare, very collectible and in near-mint condition.
Size: 1.45 x 0.76m (4' 9" x 2' 6").
Brian MacDonald Antique Rugs & Carpets has dated this Antique Baluch Sofreh Rug to the 1880s.
Dealing in antique and old tribal rugs, dowry weavings and decorative carpets from the near east and central asia since 1979.
You can view the stock and full dealer information on the Brian MacDonald Antique Rugs & Carpets Profile Page