Rescued Pinarello, please help identify. Thanks.

Hi friends, it's been a long time since my last post. The vintage road bike market completely dried up in my area. I re-invented myself, and have learn to appreciate fine art, and vintage watches. However, I would never pass up vintage steel, as itself is artistic. I picked up this Pinarello locally, unfortunately, it became someone's unfinished project. It does not bother me at all. I do however, would like to know the style. The only decals are on the downtube, and partially on the seat tube. It has all 105, with Pinarello stamped Nisi wheels. Seat post is a 26.8. Thank you, and please let me know if you have any questions. Thank you.