This is a commemorative, non-sale keyholder with a case, distributed by All Nippon Airways for "Honeymoon Flights." It's from the 1970s. The medal part is approximately 3.5cm in diameter. The red side features the old logo mark of Da Vinci's helicopter. The blue side has the words "FOR YOUR HONEYMOON FLIGHT" around a Tristar aircraft. The plastic case has the characters "Kotobuki" (Longevity/Congratulations) and "All Nippon Airways." It was stored in a chest of drawers and is unused, showing no signs of deterioration due to age. Please understand that this item has been stored at home for a long time before considering a purchase.