Sannam {local name}.
S4 {Samba} the original desi variety was from the town Virudhunagar, Tamilnadu State.
S4 was one of the initial varieties of Chili available in India & exported from the country till the 1990's. In fact, this was the only variety for decades till the various hybrid varieties were developed during the late 1990's. 
Mainly grown in Tamilnadu, Andhra Pradesh & Telangana states. Other similar varieties such as 334 & Super 10 also classified as S4 chilli as their physical and chemical character are quite similar.
Crop size of S4 variety Dried red chilli of Indian Origin would be approximately 200,000 metric tons.
Bright Red Colour Pods with the width slightly broad.
Scoville Heat Unit- 18000 SHU to 35000 SHU, Tamil Nadu - 30000 SHU -35000 SHU colour a bit deep red, Andhra Pradesh - 18000 SHU - 25000 SHU, Telangana- 25000 SHU – 30000 SHU.
 
ASTA - Colour value of S4 variety Dried red chilli 50 ASTA to 60 ASTA.
Mainly consumed by Domestic markets of Bihar / Uttar Pradesh/ West Bengal. CHINA buys a lot of this variety as a direct Stem Cut.