One of two Southwest 737 images I took at 10 in the morning. Both images were taken at this angle, however, there will be differences between the two airliners.

N602SW is one of 145 737-300s within the Airline's fleet. This example has been retrofitted with an advanced Electronic Flight Deck and blended winglets. The engines are still the early generation CFM56 turbofans.

Southwest is in the process of retiring the -300s.