1960s BIBA London navy blue milkmaid maxi dress bohemian

this rare gem from
the cult London brand BIBA is beyond killer. amazing princess sleeves and button up milkmaid bodice

label: BIBA
tag size (vintage): n/a
material: n/a feels like amazing cold rayon
length: 55"
chest: 32-35" fully buttoned. can fit a larger bust with a button or two undone
waist: up to 26"
as is: a teeny bit of wear at the zipper fabric and some seams but nothing manor. possibly a flaw i missed