Deadstock vest from 1970s

Material label says 50% cotton 50% polyester , thin fabric with some stretch   Size label states 170, this was originally for a 16 year old but same measurements as a modern XS (Skinny stretch fit )   Shirt has no obvious marks or damage measured flat Sleeves 0" Shoulders 0" Chest (pit to pit) 10"-20" Length 25.5"