Vintage French linen shift dress trousseau nightgown with monogram

Vintage linen night gown or shift which would have been part of a lady's trousseau, handmade and embroidered with a monogram on the right upper chest area. I believe this is an A with a J although it is indistinct.
The neck edge is finished with a scalloped whip stitch trim. The armhole edge is also worked with a scalloped whipped stitch.
This item has a mixture of hand and machine stitching.
Trousseau items including bedlinen, table linens, night wear and undergarments were usually sewn during long winter evenings when the girl was approaching womanhood and contemplating a marriage, she would prepare a trunk of linens to take with her to her new marital home.

This item probably dates from the first part of the Twentieth Century, because it is not full length.
I think it is roughly a size English 14-16, it is certainly generous, and laid flat across the armholes it measures approx 60cm, flaring out from there in an A line shape with side gussets at the hem, total circumference at hem is 176cm, across the shoulders from the armholes it is 40 cm, total circumference of armholes is 54cm, and shoulder to hem is approx 114cm.
This item looks almost unworn. There are a few age and storage related marks which I have not attempted to launder, including iron mould or rust, I think they will come out in a wash and you can get specialist spot on cleaners for this type of storage mark.

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