9mm Luger Headstamp Triangle and Star 3 49

In this headstamp ( gigconceptsinc.com/9mmP-Hst-Checklist-2002.html ) List I didnt find this headstamp, what I`m looking for:

This export ammo was made in Czechoslovakia in late 1940’s early 1950’s.

This type of stamp with a triangle can be located on Lew’s Headstamp list with the “Sy” prefix (“Sy” for “symbol” character), specifically it is “Sy07A”. Your cartridges were made by Sellier & Bellot of Czechoslovakia.

Ok, thanks alot!