Kodachrome II was introduced in 1961. It was the first film stock since 1936 that was specifically meant for amateur use. Eastman Kodak presented the material as superior to the ‘regular Kodachrome’. It supposedly had a higher speed of 25 ASA for daylight and 40 ASA for photoflood illumination, was sharper and had an improved image quality.
This film expired in October 1975 so may give unpredictable results when developed. Aluminum film can is still sealed with it's original black fabric tape indicating this is a new roll.
Enjoy some experimental movie making with this rare find!