This Knitting Pattern is from Woolcraft of 1930s, of Vintage Baby Underwear
This collection includes vintage traditional babies' underclothing, deemed to be essential in days of post-depression when British homes were cold and draughty. The vests particularly were common garments for babies until the 1970s, and will still keep the youngest children warm and cosy.
The PDF contains several pages of pattern, scanned and cleaned, showing the original text, with the matching illustration.
These patterns give both tension and finished measurements, an improvement over patterns of previous decades. These will enable you to select suitable yarn and the correct needle size to give you a satisfactory finished garment.