In this photo you can see the narrow band of embroidery on the collar as well.
In the eastern variant of which I spoke earlier, the leibyk had a pleated peplum instead of lappets, although peplums were sometimes also found in some of the southwestern villages.
From Yavirya - Явір'я [Jaworze in Polish]
This photo is from Radotsyna. Notice both types of vest are being worn.