Victorian Cloud Blue Linen Maxi Night Dress Size 49/42 Please Help Me With Brand

This dreamy long flowy night dress is made of linen and touches one's toes as she strides with a candle across the wood floor at bedtime. As if we are living out our feminine parts here in the Victorian era, sporting the natural fiber and lace embroidery trim around the neck and the short sleeve arm holes! I have to wonder, this faint and hardly legible tag says "40/42" but what brand is it!? Do you know? I can also read "Exclusive" but not the 4-5 cursive letters above that and there's no other tags or such in this. 🥺