Taken from Plymouth Patterns - 1975 Galway Worsted Cardigan Pattern: "One button cardigan with diamond pattern through out the body."
This pattern is Plymouth Patterns - 1975 Galway Worsted Cardigan Pattern.
Size US 6 needles, US 8 needles, US E crochet hook (or sizes required to obtain gauge), stitch holders, and one 1.5" button are required but not included.