This collection of 137 different used stamps from Siam Thailand is a must-have for stamp collectors who appreciate the beauty and history of vintage stamps. The colorful stamps feature various themes and are from the decimal currency era. The stamps are in fine condition and come from THAILAND and were manufactured in Thailand. There is no certification available, but the quality and authenticity of the stamps are guaranteed. This collection is a great addition to any stamp collection and is a wonderful way to appreciate the art and culture of Thailand.