S2 7.9 Meter Class Association

I thought I had a S-2 7-9FK but two persons have told me because I have 3 windows and an air vent window I have S-2 27 feet. On the pictures I have found of the S-2 27 the traveler is on top of the cockpit. Those that have inboards have a two cylinder inboard motor. My S-2 has a one cylinder Yanmar ...