Gibson's EM-150, their first electric mandolin model, was introduced in the early 1930's as essentially an A-style mandolin body equipped with a Charlie Christian pickup and volume and tone knobs. Around the late 40's, they switched to fitting the EM with a single P-90 pickup, which this particular example still sports. This example has very light scratches on the pickguard, a moderate amount of finish wear and checking on the top and sides, and a couple prominent blemishes on the back, one just below the neck heel.