This is a tear gas grenade blank by SAE Alsetex, which they offered in other calibers as well, like 12 ga. and .357 Magnum (all using contract made cases/cartridges). Also, they offered grenade adapters cups for 5.56x45, 7.5x54 and 7.62x39 rifles (see image below), but I have never seen boxes for these cartridges identified with a SAE lot.
Regarding the company’s designation, the “Société Alsacienne d’Études et d’Exploitation Alsetex” became “Société d’Armement et d’Études Alsetex” (SAE Alsetex) in 1973. The code identification list was not updated.
And regarding the manufacturer of the case/cartridge, I believe that it may have been FNM in Portugal, because of the primer crimp, sealant, and an identical “short leg 9” found in headstamps made by them around this date.