Picked this jacket up today at a local bootsale. Good quality, appears to be well made. I'm trying to research which country this comes from if any of you can help as ive hit a block and dont know where to look. Only markings i can find inside say "160" and the zipper is marked OPTI. The left arm has a pen holder and velcro patch but i'm not sure if this has been added at a later date. Part of me says East German, but i'm just not sure. Its pretty long, Im 6ft and comes down to above my knees. Some Plastic buttons the front and metal pebble buttons to the hood. Also has two D shaped metal rings on the back and loops.
Any advice would be great. Thanks