Check the listing for details. Air National Guard 1988 Planning Guide Oversize Calendar. Condition: Used. Listed at 12.99 USD. This Air National Guard 1988 Planning Guide Oversize Calendar is a must-have for any collector of vintage calendars. With its unique design and historical significance, it is sure to be a standout addition to your collection. The calendar features an oversize format that is perfect for display or storage, and it is made from high-quality materials that ensure its durability. The calendar is categorized under Collectibles and Paper, and it is ideal for anyone who is interested in collecting vintage calendars. It is a perfect addition to any collection, and it is sure to be a conversation starter. So, if you are looking for a unique and historical calendar, this Air National Guard 1988 Planning Guide Oversize Calendar is definitely worth considering.