I researched Persian rugs, and found that this was woven in
Kerman Iran, probably in the late 1960's. The story goes that a new rug
weaver opened shop with the intent of making the highest quality rugs.
The other rug weavers sued him in local court to prevent him from
outdoing them. They lost. This rug has 360 stitches per square inch, and
therefore because of the high stitch count, is believed to be from the
'outlaw' rug weaver. Digital photos don't do light blue colors justice,
and the close up gives a better look at the stunning color.
From Rug Rag
Kerman Rug / Carpet (really a carpet in this size). Sometimes loosely
referred to as "American Kerman" circa 1960's as you determined and as
mentioned. It is a true Persian carpet woven in Persia / Iran. The
vast majority of this "American" Kerman style are post WWII. Earlier
than WWII generally follow a less rigid motif, although will often have
Finer and more choice Kerman rugs from this vintage will have in excess of one dozen
colors with a knot density of around 225 knots per square inch (around
15 knots horizontal, 15 knots vertical. More commercialized Kerman rugs
(often also the later era) will have fewer colors be in the area of 170
knots per square inch (around 13 horizontal, 13 vertical) or less.
Yours appears to be the latter based on many factors, but a find nonetheless.
Many incorrectly count knots, or dealers often inflate such numbers
and other information. More likely with this carpet, knot count of 360
was inaccurately determined by counting the double ply yarn as two
separate knots. For example, 13 knots horizontal by 13 knots vertical =
169 kpsi. Counting two knots vertical for each vertical knot
(incorrectly assuming 2 ply is two separate knots) brings the count to
13 x 26 = 338 kpsi. Congruent with a less reputable dealer's story or additional misinterpreted knot count, may bring it up more...
Knot count is often irrelevant in the scope of a carpet. However,
if accurately measured, it should be assessed in two or more areas of a
carpet. Especially more toward the inside: e.g. samplings in and around
the field. Although a minority square area (in the scope of the entire
carpet), often the outer 2" or 3" of a mid-century Kerman rug edge is more
tightly woven than the rest of the carpet. Generally, in this area,
Kerman rugs of this vintage and knot density will not fall far outside a
5% margin +/-.
Note: Photograph above is a stock image found on LiveAuctioneers.com