the second one from 1994 to 1995.
A treaty between the Soviet Union and the People's Republic of Mongolia, in 1926, resulted in the independency of Tuva. At least for those two countries as no other country officially recognised Tuva's independency.
No wonder that the first stamp of Tuva, issued in 1926, was in Mongolian language.
(this stamp is NOT in my collection (yet)).
We see on the stamp the buddhist wheel of life, and writings in Mongolian language.
Also the numbers are written in Mongolian.
UPU rules state that the numerals should be written in arabic numerals!
|1st stamp of Tuva - wheel of life|
and to raise money then to serve 'postal' purposes.