The Oka was a standard measure of weight used in Greece, Turkey and elsewhere in former dominions of the Ottoman Empire. It was equivalent to 1.282kg and was subdivided into 400 drams.
The oka was made obsolete by an act of Greek Parliament effective on December 29, 1953 that replaced it with the kilogram. Nevertheless, the oka continued to be used, unofficially, well into the 1960s by customers and grocers who were accustomed to it.
Did you know?
The Greek expression "Τα 'χει 400" ("He has 400 of them") - meaning that someone is brilliant - stems from the fact that the oka had 400 drams.