Pressure suit which introduced many modifications from the early MC-3A capstan suits. A torso bladder used a redundant full pressure controller and full pressure helmet (1972), 12 sizes, used for high altitude reconnaissance aircraft, exterior cover of various colors worn over pressure suit, This was the last capstan partial pressure suit in operational service - retired with the U-2C aircraft in 1989.

• Sears, William J, A Historical Review of Partial and Full Pressure Suits, . Accessed at: http://webpages.charter.net/mcelwain/PSUITS-Chronology.htm.