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Walk-around of the feed port.

Picture 6 of 6.

The edge of the feed port is marked with "ASSY A6L-102005-08". The feed port was added to the helmet during the A6L development cycle, and many suit components retain their "A6L" part number.

Note the grooves in the feed port's edge, to allow the feed port cover to engage for opening and closing. To remove the feed port cover, the astronaut would depress the cover, rotate it clockwise, and pull out.

 
Apollo A7L/A7LB Pressure Helmet Assembly ("Bubble Helmet") feed port at Apollo:  When We Went to the Moon
Time picture taken Wed Nov 6 12:46:44 2019
Location picture taken Apollo: When We Went to the Moon Exhibit
Space Hall
"Old" Museum
U.S. Space & Rocket Center
Huntsville, AL
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