Men's Vintage Mr Sport Button Down, funky and fun

Vintage (maybe 70's or 80's?) Mr Sport, Miami, button down. The size and material tag is worn and unreadable. Pit to Pit is 21". The material feels silky like vintage nylon, maybe polyester. Super fun and funky yellow and black geometric pattern. There is a small stain near one button. The collar stays have a worn a hole on each side, this is on the under side of the collar, so not visible. There is also a few spots of some wear on the back, that are thin or tiny holes. Please see pics, still in usable condition for something of this age.