Antique Moroccan Islamic Dagger Koummya Jambiya with Silver Mounts

Museum-quality antique 19th century circa 1850 AD silver-mounted Islamic, North African Maghrebi, "Arabic Moroccan dagger Jambiya Koummya." A superb quality curved tapering double-edged steel blade with complex bevel, cut on each face of ricasso with two narrow fullers. Also, the back and inner rim of the ricasso are cut with grooves. A wooden grip of characteristic form, a silver ferrule, and a peacock's tail pommel, chiseled in foliate in its solid silver scabbard, chiseled with expanded flower heads and scrolling foliage.
This dagger is better quality than average Moroccan koummyas with an extremely fine quality steel blade hardly ever seen in this type of jambiya.
REFERENCES: This is a museum-quality dagger, which can be found on display in museums. A similar Moroccan koummya Jambiya from the French Museum is published in the book "Islam: Les Armes Blanches de l'Atlantique à l'Indus" by Alain Jacob on page 9.
Please see the picture of the page attached to the listing.
The market is flooded by tourist souvenirs, reproductions of Moroccan dagger Koummyas with crudely made iron blades and white metal mountings. These reproductions do not have any historical or investment value.
The buyer will be provided with a copy of the page from the mentioned reference together with a certificate of authenticity.
CONDITION: In good condition considering its age, showing age and usage, traces of slight rust on the end of the blade, minor dents on the scabbard, hilt with minor age cracks (as it is common in these types of antique daggers hilts).
MEASUREMENTS
Overall length in the scabbard: 40.7 cm (16 inches)