World Aeronautical Chart - a condensed sectional that covered a much larger area. Phased out starting in 2015. Scale was 1:1,000,000 instead of the 1:500,000 used for sectionals.
https://www.faa.gov/air_traffic/flight_info/aeronav/productcatalog/vfrcharts/world/Apparently you can download old digital files at
https://aeronav.faa.gov/content/aeronav/wac_files/. PDFs at:
https://aeronav.faa.gov/content/aeronav/wac_files/PDFs/
