However many of the redesigned stamps reached Tuva in 1938, they again were out of some needed values in 1939 and clearly Russia was too busy in other matters to make stamps for Tuva far in the east. 

So again stamps were surcharged at Kyzyl, and then again in 1940 and 1941, and then again in 1942.  Thirteen stamps were surcharged in these four years...all of them very high face value stamps which were brought down to the needed 10, 20 and 25k values needed for mail. 

Nobody denies that most of the 1934-36 issues were printed for sale to stamp collectors, and very little of the mail carried in Tuva has survived.  Of the surviving materials, much never left the USSR.  Still the existence and circumstances of these surcharged values proves that some quantity of these stamps was in Tuva, was used for postage, and the fact that these high values were surcharged down for postal rates again supports this fact.  None of these surcharged values ever appeared for sale to philatelists...they carried the mail (and none of it was philatelic).

But still the American catalog will not revise their catalog.  Even worse they ignore some of the most interesting stamps of Tuva -- undeniably made for postal use ONLY and sold to deliver the mail.