EKKA31 - E6 - EKKA can mean 2 things.
1. ekka: [noun] a light 2-wheeled one-horse one-passenger carriage used in India.
2.The Ekka is Queensland's largest annual event and your greatest chance throughout the year to find out what life on the farm is really about.
There is also this.....
https://commons.m.wikimedia.org/wiki/Category:Ekka