This series contains 2 boxes that contain two different pattern systems. The Modular Pattern system consists of 11 folders that each hold a different handbook helping draft and create several types of clothes from a basic bodice to a skirt and pants. The other drafting system, The New Metric Pattern Drafting system 6 folders that also hold handbooks helping draft and create clothes but also tips on how to hem them properly as well. The date range for this series is 1976-1993