I do not believe this is a Schott jacket for a few reasons. This color lining is not a lining we used, but even if the lining was replaced, we did not use Esko zippers. The last would be the thin front buckle, our buckles are much wider. Gail
It could be possible there was a zipper company by that name, and possibly we did try the zipper, but it is the first time I heard of the name. I know in the 1960's we used Talon and the zippers with the ring pulls are a classic zipper for M/C jackets. We always had labels in our jackets, along with size and leather care labels. Of course if the lining was replaced and the labels not sewn back into the jacket then it becomes harder to determine the manufacturer. I can confirm though the buckle on the jacket is not like the buckle we use on our jackets. Yoiu can probably search some older Perfecto jackets and see the difference in the buckles.