Granted, it's an older lot, but an interesting match to say the least (measuring at ~2000 kpsi!). A similar carpet from an October 13th, 2005 auction in London, may be found on SpongoBongo.com for Oriental Carpets and Persian Rugs, covered by Barry O'Connell Jr.
Sotheby's Lot 91, Saturday May 18 2pm, 1985.
Sold: $60,500 (1985) including 10% buyer's premium.
Description: "Kum Kapour Prayer Rug. Istanbul area, Turkey, signed Zare in center (1903-1906), woven with approximately 2000 knots per square inch. Approximately 4ft. by 2ft 9in. (1.2m. by .84m.)
Zare was the official master weaver of the Kum Kapour workshop from 1903-1906, but stayed on for many years in an unofficial capacity until his death in 1930.
For a thorough discussion of the Turkish weaving workshops, pleas refer to Hali, Volume VII, No. 2, 'The Masterweavers of Istanbul," Pamela Bensoussan, pages 34-41."