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Sph-4 Helicopter Hel...
Sph-4 Helicopter Helmet Manual


Sph-4 Helicopter Helmet Manual. Written by Natick
Labs, division of the US Government who tests Life
Support products and tests same. This manual
describes the SPH-4 helicopter helmet. Prior to the
acceptance of this helmet, in the 1980s, pilots used
a number of jet aircraft helmets when flying
helicopters, like in Viet Nam. None of these helmets
had the crash protection and sound attenuation of
the Sph-4. The Sph-4 was also easier to adjust in
the field than the previously used helmets. This
manual, PHOTO COPIED from the original, describes
the construction, fitting, adjusting and care and
repair of the Sph-4 helmet.

Item Info:

Item #: 141853
Category: Militaria
Last updated: July 22, 2012
Item: Single Collectible
Condition: New
Item for: Sale


Item ships from: New York, United States
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North America  USPS  ground  7 days  $2.95 USD  $2.00 USD 
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