An all-over Shetland design for a woman or girl, using alternating bands of dark pattern on a light background and light pattern on a dark background. Although colours used in Shetland knitting are generally subdued, traditionally one strong colour may be introduced into a pattern. The front band is worked separately and sewn on afterwards.
The cardigan is knitted in Shetland 2-ply Jumper Weight Wool, which is a 4 ply equivalent.

text taken from original book by Gwyn Morgan

Please note, the yardage is an estimate! The yarn specified in the book doesn’t really exist anymore. Jamieson’s is the closest equivalent I could think of, as the book specifies a traditional Shetland 2 Ply Jumper Weight Wool - and the book only specifies the amount of yarn in balls and ounces, not metreage or yardage.