The Eduard Bf-109E-1 modified to Bf-109B-2 with the Alley-Cat conversion set. Very easy.
There's been no end of confusion over the camouflage the first Bf-109B's were in when sent to Spain. I agree with Lynn Ritger's research, that they were taken directly off the production line (lots of sources for that), and sent in 70/71/65. The confusion comes from the later Bf-109Cs and Bf-109Ds that were sent in 63/65 and then repainted in the field.
Finish "sun-faded" in the hot Spanish sun per some photos in Lynn's first 109 "Modeler's Guide".
15 additional images. Click to enlarge.