Butterick’s company was also the first to introduce an enlarged and detailed instruction sheet, which they called a “Deltor.” The earliest paper sewing patterns were pre-cut on plain tissue, with notches and holes for markings which aided in construction of the garment.The printed pattern was introduced in the 1920s, but did not become commonplace until just after World War II.
And for an ordinary design, it might be better to wait for a copy in better condition.Look along the edge on the back of the envelope, or sometimes on the flap.Simplicity patterns were dated in the 1940s and into the 50s, on the instruction sheet. Simplicity stopped putting dates on most patterns in the early 50s, but in the mid 1960s they began printing it on the envelope back.These patterns are “factory folded” and they are a real treat to find.
There is no guess-work about completeness with a factory folded pattern.
There are four large pattern companies still making sewing patterns today: Butterick, Mc Call’s, Simplicity and Vogue.