I was just wondering whether somebody could help me verify the authenticity of what I think is my 618? I bought it used on ebay and it's generally in great condition, except that the labels were cut off. It was advertised as such and I didn't think anything of it when I bought it, but since receiving it I've realized that its authenticity is important to me. It doesn't bother me that it's missing the labels; it would only bother me if it were a fake. I've included some photos of the jacket, the spots where the labels would have been, the pocket tag, the zippers, and the branded snaps and buttons. It has 'IDEAL' cuff zippers and a 'YKK' main zipper. The belt buckle is square with no markings on it.
If it's possible to date it on that information alone, I would also be grateful for that info. I'm happy to enclose any additional photos if that would be helpful.