An old Arabic unit. Also romanized as oka, occa, ocka, ocque, oque, ocao, occhia. Primarily a unit of mass (= 400 drachmes).
In Turkey, two units, one of mass and one of liquid capacity.
At least as early as the 14th century – 19th century, a unit of mass, about 2.834 pounds avoirdupois.
For Smyrna, Hayes (1740, page 410) reported the oke (which he spelled “oak”) = 400 “drams”, and was about 2 pounds 11 ounces avoirdupois (about 1.219 kilograms). But he also says 1 avoirdupois pound is 140 drams, making the oke 1.296 kg. There were special okes for some high-value commodities: an oke of opium was 250 drams (about 810 grams, using Hayes’ equivalent for a pound), an oke of saffron was 120 drams (about 388 grams).
On 24 August 1821, the London Mint compared British standards with a set of weights certified as accurate on 10 April 1821 by the official in Constantinople responsible for such certification (see Kelly, 1835, volume 1, page 376). They obtained the value 1 oke = 19800 English troy grains, equivalent to 1.283 kilograms or 2.828 pounds av. (about 2 pounds 13¼ ounces).
The standards of Constantinople and Smyrna apparently differed, though theoretically identical.
Il cantare d’Acri si è ruotoli cento, e lo ruotoli si è 12 occhie, e ogni occhia si è pesi 44, di pesi 79 per una libbra.
The cantare of Acre is 100 rotolli, and that rottolo is 12 oke, and each oke is 44 pesi, with 79 pesi to a libbra.
Et ancora in Constantinopoli sono alcuno drugarie le quale se vendeno ad uno pexo il quale se chiama ochaa. Et ochaa 1 sono lire 4 sotile venetiane.
And even in Constantinople there is some produce which they sell by a weight which they call oke. And 1 oke equals 4 Venetian libbra sottile.
Bartolommeo di Pasi.
Tariffa de' pesi e mesure con gratia et privilegio.
And, in Turkey, a unit of liquid capacity, 1.28 liters. But Guillame says in Turkey 1.1518 imperial pint (about 654.5 milliters).
As oca. In Romania,
3rd Ed., rev. by the author and Andrei Bantaș.
Bucharest: Editura Științifică, 1973.
In Yugoslavia, a unit of liquid capacity, about 1.415 liters (about 1.5 U.S. liquid quarts).
In Bulgaria, a unit of liquid capacity, 1.28 liters.
In Greece, a unit of liquid capacity, 1 1/3 liter.
In Cyprus, ? - present, two units:
United Nations, 1966. TRNC, 2002. Technical Factors..., 1972, page 142.
In Lebanon and Libya, 20th century, a unit of mass, approximately 1.282 kilograms.
United Nations, 1966.
In Saudi Arabia, 20th century, a unit of mass, = 2.8 pounds, approximately 1.2701 kilograms.
United Nations 1966.
In Syria , 20th century, a unit of mass, approximately 1.2825 kilograms.
United Nations 1966.
In Egypt, a unit of mass, the Custom’s oke 2.751 pounds. In Alexandria, 2.805 pounds.
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Last revised: 15 March 2011.