Retro H&M Top

Super unique top from Divided by H&M. Not sure of age, I’ve owned for around ten years now but I did buy it second hand. I’ve only worn it once since owning. Some underarm staining that is only visible on inside of shirt. This was present before I bought. I do not believe it will come out since I have washed since owning. Exterior in wonderful shape aside from minor pulling. Marked a size 10, fits me as an extra small. 60s 70s vibes