mattaro

A unit of liquid capacity in North Africa. Also spelled mataro, mettar, metal, metallo, mitre.

In Libya, 20^th century, a unit of capacity, about 23.32 liters (about 6.16 U.S. gallons).

Nineteenth Century (mostly from Doursther, 1840)
Locale	Local Names and Equivalents	Liters
Algers	mettallo, metalli; for oil; weighs 20 rotl-kébir or 30 rotl-attari, about 16.38 kilograms	17.90
Tripoli	mattaro; for oil; weighs 42 rottoli, about 20.9 kilograms	23.34
Tunis	mataro, mitre, mettar, metal; for oil;	19.69; 19.40¹
Tunis	for wine; 6¼ mitres = 1 millerole	9.88
Soussa	for oil	24.00

1. Kelly, page @.

In Tunis and Tripoli, 14th century, a unit of liquid capacity for oil, about @ liters.

L'olio si vende [in Tunis] a una misura che si chiama mattaro, il mattaro à rottoli 32 a peso, e fa chonto una garra di Tunisi tiene 5 in 6 mattari.

Oil is sold by a measure they call a mattaro, the mattaro weighs 32 ruotoli, and they count a giara of Tunis as containing 5 to 6 mattari.

Italian in Majorca, 1399.
Archivio Datini. Registro. 1026, as quoted in Edler, page 173.