Brian MacDonald Antique Rugs & Carpets has dated this piece to the 1880s.
Some salt-bags or namakdan where 'namak' is the Persian word for salt, were coarsely woven and some, like this one, were incredibly fine.

In this case, the namakdan was made by Shahsevan nomads in the environs of Moghan in north-west Persian Azerbaijan around the last quarter 19th century and is in exceptional condition for its age.
Size: 44 x 38cm (1' 5" x 1' 3").
Brian MacDonald Antique Rugs & Carpets has dated this piece 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