Vintage tribal Coin Dao woman buy tunic in Cao Bang area,north of Vietnam

Vintage tribal Coin buy Dao woman tunic .
Age is over 25 years and still very good condition.
This has a tunic richer decoration than their Coin Dao group in Mai Chau area.
On the front,the long,thin collar is made of appliqué stripes bordering pink embroidered silk cotton weave stitches.The two front flaps and sleeve cuffs are bordered by stripes of black appliqué.
The tunic back has same borders as the front with a few more designs on the shoulders,at the waist is more embroidered also,a motif repeated at the bottom.
Hand wash and separate in cold water.
Measurement
Length 109 cm
Sleeve to sleeve 137 cm
Arm length 37 cm
Underarm width 36 cm
Chest 86 cm-112 cm
Armpit to armpit 60 cm
Weight 580 grams