Exceptional ultra high-grade MISB example of Series Five Headmaster: Siren. Box showcases six exceptional panels with vivid color and high gloss throughout. No flap crease whatsoever. Factory tape sealed at each end. One edge shows evidence of light colorbreak. Window and bubble securing car are crystal clear. Overall, an immaculate MISB piece that is extremely difficult to find in this condition. Freshly graded in 2024. Encapsulated by AFA (85, 85-85-90), #15337183