International Ovals, sorted by country S to Z 

The information in italic has to be confirmed, the rest comes mainly from RPW3 or international organisations sources.

Country OVAL

Used between :

or since : ISO 2/3
Saarland, now in Germany SA 25-35, 45-46 now in D    
San Marino RSM   32- SM/SMR
Sao Tome and Principe       ST/STP
Sarawak, now in Malaysia SK 55-63 now in MAL    
Saudi Arabia SA   begin.70s- SA/SAU
Saudi Arabia (unofficial Oval seen (small black/orange)) SAT      
Saudi Arabia (unofficial Oval seen in France) AS      
Senegal SN   62- SN/SEN
Serbia (unofficial Oval seen in France, 90's) SER      
Serbia, now in Serbia Montenegro SB 11-18 now in SCG    
Serbia Montenegro SCG 2003-    
Seychelles SY   38- SC/SYC
Siam, now Thailand SM 30-55 now T    
Sierra Leone WAL   37- SL/SLE
Singapore SGP   52- SG/SGP
Singapore (unofficial Oval list) SG      
Slovakia SO 39-45, 93 now SK    
Slovakia SQ 93 now SK    
Slovakia SK   93- SK/SVK
Slovenia SLO   91- SI/SVN
Solomon Islands       SB/SLB
Somali French Coast, now Djibouti (reported Oval) CFS now RDD ?    
Somalia SO   begin. 70s- SO/SOM
Somalia Protectorate, now in Somalia SP 38-60 now in SO    
South Africa SAU 33-56 now ZA    
South Africa ZA   36- ZA/ZAF
South Georgia and South Sandwich Islands       GS/SGS
South Korea ROK   71- KR/KOR
South Korea (unofficial Oval list) KO      
South West Africa, now Namibia SWA 35-66 now NAM    
Southern Rhodesia, now Zimbabwe RSR 60-79 now ZW    
Southern Rhodesia, now Zimbabwe SR 32-60 now ZW    
Soviet Union, now split SU 26-91 now RUS+UA+BY,...   SU/SUN reserved
Spain E   10- ES/ESP
Spanish Morocco, now in Morocco ME 35-52 now in MA    
Spratly Islands - China sea       SI reserved
Sri Lanka, former Ceylon CL   32- LK/LKA
St Helena       SH/SHN
St Kitts and Nevis       KNKNA
St Lucia WL   32- LC/LCA
St Pierre and Miquelon       PM/SPM
St Vincent and The Grenadines WV   32- VC/VCT
State of North Borneo, now in Malaysia SNB 38-55 now MAL    
Straits Settlements, now in Malaysia SS 32-52 now MAL+SGP    
Sudan SUD   63- SD/SDN
Suriname SME   36- SR/SUR
Svalbard and Jan Mayen       SJ/SJM
Swaziland SD   35- SZ/SWZ
Swaziland (unofficial 1926 Oval list) SID      
Sweden S   11- SE/SWE
Switzerland CH   11- CH/CHE
Syria SYR   52- SY/SYR
Syria and Lebanon, now split SL 31-52 now SYR+RL    
Taiwan RC   32- TW/TWN
Tajikistan TJ   96?- TJ/TJK
Tangier, now in Morocco MT 33-56 now in MA    
Tanzania-Tanganyika (2 Ovals, 1 ISO) EAT   38- TZ/TZA
Tanzania-Zanzibar (2 Ovals, 1 ISO) EAZ   38- TZ/TZA
Thailand T   55- TH/THA
Thailand (unofficial Oval list) TAI      
Togo TT 32-52 now TG    
Togo TG   62- TG/TGO
Tokelau Island - South Pacific       TK/TKL
Tonga       TO/TON
Trengganu, now in Malaysia TU 35-48 now in MAL    
Trieste, now in Italy TS 45-54 now in I    
Trinidad and Tobago TT   64- TT/TTO
Trinidad and Tobago TD 38-64 now TT    
Tristan da Cunha       TA
Trucial Oman, now Oman TO 60s now ?    
Trust Territory Pacific Island, TTPI   now FM, FW, MH, MP   PC/PCI reserved
Tunisia TN   57- TN/TUN
Tunisia (unofficial Oval list) TU      
Turkey TR   35- TR/TUR
Turkey (reported RPW3 p577) T now TR    
Turkmenistan TMN 93-96? Now TM    
Turkmenistan TM   96?- TM/TKM
Turks and Caicos       TC/TCA
Tuvalu       TV/TUV
Uganda EAU   38- UG/UGA
Ukraine UR 91 now UA    
Ukraine UA   92- UA/UKR
Ukraine (unofficial Oval seen in France (80s'), cyrillic ?) YK      
United Arab Emirates       AE/ARE
United Kingdom GB   10- GB/GBR
United Kingdom (unofficial Oval seen in France 2/98) U,K,     UK see GB
United States of America USA   52- US/USA
United States of America (1912 Encyclopedia Oval list) US      
Upper Volta, now Burkina Faso RHV 70s-90s now BF   HV/HVO reserved
Upper Volta, now Burkina Faso HV 61-70s now BF    
Uruguay U 49-70s now ROU    
Uruguay ROU   end 70s- UY/URY
Uzbekistan UZ   96?- UZ/UZB
Vanuatu       VU/VUT
Vatican (unofficial Oval list) SCV      
Vatican City State V   31- VA/VAT
Venezuela YV   55- VE/VEN
Vietnam VN   53- VN/VNM
Wake Island       WK/WAK reserved
Wallis and Futuna Islands       WF/WLF
Western Sahara, now in Morocco       EH/ESH
Western Samoa WS   62- WS/WSM
Yemen YAR   begin. 70s- YE/YEM
Yemen Democratic Republic, now in Yemen ADN 38-80 now in YAR   YD/YMD reserved
Yugoslavia YU 52-2002 now SCG, SLO, HR, MK
YU/YUG
Yugoslavia Y 36-52 now SCG, SLO, HR, MK    
Zaire (unofficial Oval seen in France) ZAIRE      
Zaire, now Democratic Republic of Congo ZRE 81-99 now CGO   ZR/ZAR
Zaire, now Democratic Republic of Congo ZR 73-80 now CGO    
Zambia Z   66- ZM/ZMB
Zimbabwe ZW   end 70s- ZW/ZWE
Zimbabwe ZM end 70s now ZW