Sterile white soft hat, owned and worn by Gemini XP mechanic Don Black. This type of hat would be worn to maintain a clean and sterile environment while working on different projects for the Gemini missions. Hat is labeled on the inside of the band, “5.1-4.” Accompanied by two glossy 10 x 8 photos of Black, one working on the Gemini 9 assembly at Pad 19, the other posing with co-workers in front of the Gemini 12 capsule, each signed in black felt tip by Black. RRAuction COA.