This pattern is from the 1960s.

It’s a circular yoked ladies’ cardigan with eyelets in a radiating pattern from the neck, and 7 buttons down the front.

It is knit top-down, in the round with contiguous, 3/4 sleeves.

The different sizes are achieved by using different gauges (sm: 4 sts/in, med: 3.5 sts/in, lrg: 3 sts/in).