Thailand medical revenue stamp.
s-l1600 (2)แสตมป์บริษัท The SERMMITR CO.,LTD
thailand_sermmirtป้ายฉลากยาตราสามธง ของบริษัท The SERMMITR CO.,LTD

1970’s Thailand pharmacy seals Sernmitr Company Bangkok printed by De La Rue
Printed to seal packages of pharmacy products to prevent counterfeiting.
the red seals are 3 different shades of 3 different printings.
The green seal has perfins “TDL Specimen”. The text in Thai blow the printings states that the seal should be present to guarantee the original product.