A scare-mongering knitting ad from the 1950s, warning mothers that spring is not all sunshine and daffodils. Don't put those winter woolies away just yet, mother! In fact, you'd better knit a pram set or two - "knit one now just as a precaution against these early Spring cold spells, put it away during the Summer, and when you bring it out in September it will still fit baby the whole Winter through!"
Either babies didn't grow as quickly in the 1950s as they do now, or that is one stretchy baby outfit. A rather desperate attempt by Bairns-Wear to encourage a frantic burst of knitting activity before the traditional summer lull.