Welt seam LSq: It is made by superimposing two plies with the raw edges uneven and sewing a plain seam; both seam allowances are pressed in one direction and topstitched to catch the wider seam allowance.
I've never considered a cream/white leather jacket before. but damn, this one is so stylish. It's an awesome mix of futuristic (look at the diagonal lines near the zipper!) and biker, with a flair for a feminine side.