Introduced in the mid-1940's as Line #800 in colorless glass and marketed as Krystal Klear. It was a large line and had four pages in the 1948-49 Viking catalog. By 1950 the line had dropped to just 12 pieces and the Christina name was dropped and it was referred to as the "Octagonal Line."
Reference: "Viking Glass 1944-1970" by Dean Six (page 84).
