Horses Atelier boxy blue shirt dress

Horses size 2, US medium. 45” length, 21” pit to pit width. Care tag faded but fabric feels like a heavy silk linen twill or a really nice cupro, has a lovely slight sheen to it, really beautiful blue. Mother of pearl buttons, mandarin/band collar. Large buttoned pockets at front. Loose, comfy oversized fit. Wide 3/4 sleeves. Not a style they made a lot of but a lovely piece! Slight discolouration on back, small white mark on front pocket.