Jim Irwin’s Communication Carrier Electronic Module (CCEM), part no.
16495G-02, serial number 257, manufactured by the David Clark Company,
and worn by Jim Irwin during the Apollo 15 mission, including on the
lunar surface. This module is the hardware component of the
Communications Carrier Assembly, more commonly known as the ‘Snoopy
Cap.’ It consists of earphones and microphones for both the right side
and the left side. The two sides are joined with a 10.5? wiring harness.
In addition the right side has a wiring harness with a connector at the
end for connecting to the spacecraft umbilical cable. The electronics
for the earphones and microphones are contained within blue molded
rubber enclosures, with molded recesses for the earphones. These rubber
enclosures would be held in place over the astronaut's ears while
wearing the ‘Snoopy Cap’. The wire harnesses are covered with Teflon
fabric, which is the same fabric used for the ‘Snoopy Cap.’ In fine
condition, with the right earphone having been cut for a repair and then
resealed. The module comes with its plastic storage bag, with a JSC
Projects Parts tag stapled to the outside, dated March 6, 1996. Four
other labels are affixed to the bag including a NASA Cleaned For Service
tag dated March 9, 1995 (to prepare the module for long-term storage),
and a Boeing FEPC Form 1106.
This particular lunar-worn item has
taken a unique and interesting path from the lunar surface until now.
First worn by Irwin during the Apollo 15 mission, including on the lunar
surface during his three moonwalks. Shortly after his return to earth,
his entire Communications Carrier Assembly (CCA) was inventoried and
placed into NASA bonded storage. After receiving an internal request,
NASA reissued this CCA in support of the Skylab to be used during
astronaut training. At this point, an Apollo Spacecraft Hardware
Utilization Request (ASHUR), dated August 12, 1971, was issued
authorizing transfer and downgrading the unit from a Class I flight
article to Class II. The form shows Irwin's headset overall part and
serial number, “16536G-04 S/N 257”; while each individual part carried
its own serial number as well. The document states, “These units are to
be assigned as flight crew training units as required for remaining
Apollo missions and Skylab missions…Upon completion of crew system
training requirements, these communication carriers will be returned to
MSC bonded storage for disposition as artifacts.” A number of years
later, NASA decided the assembly was no longer needed and released it to
GSA auctions for disposal as an artifact. Accompanying the module are
copies of the ASHUR tag (the original being housed in the National
Archives), as well as a copy of the 2010 receipt for the lot sold by
GSA. Arguably one of the most important pieces of equipment necessary
for space travel and EVAs, this particular piece is believed to be the
first such complete module to become available for sale, and is sure to
be a centerpiece of any space collection. RR Auction COA.
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