Not clear enough to read the registration. Picture is from May 2011, so it's got to be one of their Boeing 737-300s, of which they've had three. Still confused as to why there's no airline text on it. I thought it might be because the plane is changing owners and they hadn't had time to repaint it fully, but looking at the airlines' history, nothing lines up.
Vehicle - Airplanes 
https://www.planespotters.net/airline/Surinam-Airways