How to Sew a Separating Zipper (exposed) of a MA-1 Flight Jacket

How to sew a Separating Zipper (exposed). Category: MA-1 Flight Jacket Fabric: Cotton twill Collar: Rib knit fabric Flat-felled seam in side and back yoke Plain seam and overlock in shoulder line Double fold hem Overlock in neckline (Normally bias-bound seam) No sleeves No pockets No lining