I am having problems identifying some parts that I pulled off a NOS Nishiki Olympic 12 that I bought. I'm fairly certain that it is late 70's/early 80's from the decals...

There is a fluted seatpost that is JIS stamped and has an SR marking on it. the S is above and to the left of the R.

The other is a quill stem. No markings on the clamp. I'm trying to figure out the markings, but it could be JIN or WIN, also JIS stamped. There is a set of road drop handlebars with the same brand marking on one side of the clamp area and "Winpista" on the other side.

Any help is appreciated. I can dig up my camera and post images if that helps.