This costume was a popular subject for photographers.
It was also the subject of one of the first color photographs by Prokudin Gorsky circa 1913.
This is a rich and expensive costume.
First, a pair of bloomers, usually made of striped material is put on.Over this, a full length chemise is worn. When fully dressed, the only part that shows is the front, which is left uncovered by the neck opening of the overdress. This garment helps the fullness of the skirt and keeps the overdress from sticking to the legs. Here is an example of a chemise from Yerevan. The one worn in this region would be similar, although it would have a stand-up collar.
Most of the time the kaftan did not show at the neckline, but take a look at this photo.
Here is an exhibit in a Russian museum, where you can see the kaftan opening within the opening of the overdress. In fact, there seem to be two layers.
Some old photographs clearly show other materials being used. Here the girl on the left has an overdress of floral brocade, the one in the middle used a striped silk, and the older woman on the right has an overdress which does not have decolletage in front, but fastens closed with some ornamentation at the center line. Note that she has her hair covered under her headdress with a scarf or veil, and her attire is simpler. This accords with her age and being married. The floral brocade kaftan of the girl in the middle is also visible at the neckline.
This is an especially rich form of the costume and obviously was only worn by the wealthy for special occasions. Here are a couple of examples of this type of dress from a Museum in Yerevan. Both of these are from Karin.
Here is a photograph of an older woman from Kars district wearing a very plain version of this outfit. Note that her hair is compeletly covered.
For dress occasions, sometimes a velvet dickey with gold embroidery would be worn to cover up the chemise within the neckhole of the overdress, like this example from Akhaltsalikhe.
If we look at the cloth band, there are two large button like shapes which are worn at the sides of the forehead. Originally, this was covered by flowers made with Armenian needlelace.
Today, most opt for simpler solutions, as creating these lace flowers takes great skill and much time. One example is to cut out tiny shapes from felt.
Take a look at the variations in the various photographs.