This cache marks a significant achievement from the middle of the last century. Seen as part of the bigger picture - one of death and destruction - it's really not something to be celebrated. However, the technology and expertise behind the event paved the way for one of mankind's greatest achievements, 25 years and one month later.
The 7-character alphanumeric code that identifies the specific event will yield the coordinates:
N 51° UP W 000° DOWN
Congratulations on the FTF to mashworth.