Seems like a military challenge coin, or just a commemorative coin of sorts.
Found this on wikipedia about Operation Olive Harvest (on the RAF Akrotiri page: https://en.wikipedia.org/wiki/RAF_Akrotiri#References):
"In August 1970, detachment 'G' of the Central Intelligence Agency (CIA) arrived at the airfield with Lockheed U-2 reconnaissance aircraft to monitor the Egypt / Israel Suez Canal fighting and cease fire. Permanent monitoring of Middle East Ceasefire was undertaken by the 100th Strategic Reconnaissance Wing after the 1973 Yom Kippur War, known as Operation 'OLIVE HARVEST'.[7]
Up until 1974, RAF Akrotiri had a balanced force of aircraft assigned to it, including No. 9 Squadron and No. 35 Squadron, both flying Avro Vulcan strategic bombers. The Vulcans provided a bomber force for CENTO, one of the three main anti-Communist mutual defence pacts signed in the early days of the Cold War.[8] However, during that year, Turkish forces invaded Cyprus in connection with a Greek-sponsored coup. The UK then evacuated most of the RAF from Akrotiri as the CENTO treaty had degenerated to the point of uselessness. The two Vulcan squadrons left for UK stations in 1975. What was left at the airfield was the flying unit that is permanently assigned to the station to this day; No. 84 Squadron, a helicopter search and rescue unit.[9] In addition, the role of No. 34 Squadron RAF Regiment provided support.[10]
In September 1976, the US U-2 operations were reassigned to the 9th Strategic Reconnaissance Wing (9th SRW), but the U-2 operation at RAF Akrotiri continued to be called Operating Location (OLIVE HARVEST) OH until September 1980. Thereafter, it became Detachment 3 of the 9th SRW, although the name OLIVE HARVEST continues. Two U-2s are stationed at RAF Akrotiri, and they are still monitoring the ceasefire agreement between the Egypt and Israel, although the present operations in the US Central Command area requires further missions. U-2s also transit through RAF Akrotiri either on going into the Central Command theatre, or returning to Beale AFB, California.[11]"
