I sold a vintage knit top from 1960s
I put full details in my listing , including this below (it wasn't hidden at bottom in 'small print'! I am always very honest in listings.)
''I have machine washed it twice on '30 delicates' and it came up fine. It does still have a vintage smell, certainly not unpleasant to my nose but definitely a vintage smell. Please do not bid if this is a problem! It's a smell of old fabric and not of anything human! A smell I actually quite like.. even Kate Moss said she likes the smell of vintage clothing too. Not all garment have it but this one does.''