Plastic Stamps of Bhutan on Paintings – Airmails 1972

Bhutan Post issued a set of Four Plastic stamps on 28 Feb 1972 on Paintings. Two of the stamps postally used on envelopes are listed below.

BHUTAN AIRMAIL1
PLASTIC STAMPS OF BHUTAN USED POSTALLY
BHUTAN AIRMAIL2
PLASTIC STAMPS OF BHUTAN USED POSTALLY