OK OM DX Contest

I had real fun last night working in OK - OM DX Contest. Late at night I was searching bands and on 80m I`ve spotted large activity from OK and OM stations. They all were in contest. I went to their website to know the rules in this competion and I was in! Almost 2h spent and 28 contacts made. 100W and dipole only on 80m and real good fun.Challenge for me was to copy serial number from OK OM stations. It was a 3 digit district abbreviation. Why challenge ? It was CW only competition.