Vintage dead stock union made 60s black floral Victorian blouse dark academia m

This is an amazing new with tags vintage blouse Smoke free pet free home Slightly sheer Two working buttons at collar The ruffle down the front is sewn on Detachable belt Working buttons at cuff Vintage size 12 Marking as a size M Check measurements 19.5” p to p 24.5” from shoulder to hem This is nwt but there is what looks to be a piece of old masking tape on the collar. Tried to get off manually, but I think it needs steamed off or wear as is. Black white and gray floral print No material tag but feels like polyester Academia Vintage Dark academia Victorian Coquette Retro 60s Housewife Secretary 70s Deadstock Union made teacher wiggle pin up