Even after collecting Thailand revenue stamps for 25++ years, I am still sometime confused what qualifies as a revenue.
I will give a sample below.
The Thailand document is a permission or license to operate a HAM radio in 1938.
In the top right is a label or stamp with some serial number written inside.
I am sure money had to be paid to acquire this license.
The label/ stamp is not listed anywhere.
So what is it, label or revenue? Please give me your thoughts on this.