let's start with a Slovenian regional issue from 1929:

followed by a Belgrade local issue from 1930:
national issues, starting with:
1929

which was overprinted for re-use in 1930

then a pair for 1931

a lull until this trio for 1934

a pair for 1935 features Queen Maria (daughter of King Ferdinand I of Romania, her great grand-parents included Queen Victoria of England, Alexander II of Russia, and Maria II of Portugal)

a pair for 1936, again featuring Queen Maria

and finally, a single issue for 1937

the next issue for TB funding was a semi-postal issue from JPTT, in 1940, overprinted on previously issued airmail stamps of 1937
the first post-war issue was from 1948, again a semi-postal issue from JPTT

beginning in 1950, the Yugoslav Red Cross took on the task of issuing "seals", which through cooperation with JPTT were obligatory during a specified week (only for a single day until the 1959 issue).
the elusive first 1950 issue is identical to the below 1952 issue, without a date in the right corner.
1952

1954 (surplus 1952 issues with date obliterated)
