FLOWN APOLLO 8 MANNED CSM LUNAR ORBIT SCREW (in lucite) 

Lunar Orbit 12/21/1968

Measures 1.5" on all sides, except bottom measures 1" deep

From man who worked  at Rockwell International in California

MESSAGE INSCRIBED INSIDE THE LUCITE:
APOLLO 8 SOUVENIR
MANED CSM LUNAR ORBIT
12, 21, 1968
IN THE BEGINNING GOD...
BORMAN, LOVELL, ANDERS

Mission Objective
The mission objectives for Apollo 8 included a coordinated performance of the crew, the command and service module, or CSM, and the support facilities. The mission also was to demonstrate translunar injection; CSM navigation, communications and midcourse corrections; consumable assessment; and passive thermal control. The detailed test objectives were to refine the systems and procedures relating to future lunar operations.

All primary mission objectives and detailed test objectives were achieved. All launch vehicle and spacecraft systems performed according to plan. Engineering accomplishments included use of the ground network with onboard navigational techniques to sharpen the accuracy of lunar orbit determination and the successful use of Apollo high-gain antenna -- a four-dish unified S-band antenna that deployed from the service module, or SM, after separation from the third stage.

Mission Highlights
Apollo 8 launched from Cape Kennedy on Dec. 21, 1968, placing astronauts Frank Borman, James Lovell Jr. and William Anders into a 114 by 118 mile parking orbit at 32.6 degrees."