I believe that this is an original commercially made French costume - possibly even from the House of Jumeau. The outfit is all handmade of a good-quality navy blue wool, with the knickers and sleeves lined with lightweight gauze. There is a cream sleeveless chemisette made of polished cotton with a coarser weave plastron front which matches the square collar of the bodice. There is a tiny metal anchor sewn at the neck of the chemisette, and it is edged with blue feather stitching, as is the collar. The buttons at the back of the chemisette and down the front of the bodice are all 3-hole type. The pants close with cotton tape drawstrings at the waist. The lower edge of the bodice and the pant legs gather with elastic tapes which have stiffened over time. If you plan to have a doll wear this outfit, I would suggest replacing the elastic with modern, but this is up to the new owner to decide - I wanted to sell this original costume as found. There is also a pair of handknit stockings included. These are cotton in shades of cream with blue accents. One toe is knit with lavender yarn. These have also lost their stretchiness over time, so I would suggest just keeping them in a trunk trousseau.
Measurements are as follows: The bodice is 7" long with 5 1/2" shoulder with and 5 1/2" sleeve length (18, 14, 14 cm). The pants are 7 1/2" (19 cm) long with an adjustable waist. The stockings are 5" long from cuff to heel with a 2 1/4" long foot (13, 5.5 cm). I estimate that this costume was meant for a doll of 18 - 19" (45 - 48 cm) tall. There is a scattering of moth holes in the wool sections of this costume, with the most significant being on one sleeve and one hole at the back of the bodice. Please remember that these garments are about 150 years old! They still show very well.