The WW2 RAF Air Ministry altimeter 6A/685 is a historical military collectable from Great Britain's Air Force during World War II. This altimeter was issued by the Air Ministry to accurately measure altitude during flights, which was crucial for military operations during the era. As a piece of militaria from the United Kingdom, this altimeter holds significance in understanding the technology and tactics used by the RAF during the conflict. dated 1943 please see attached photos are part of description. in a used condition thanks for looking