Portugal, 1960s–1970s
37mm ROCKET LAUNCHER FOR GROUND TROOPS

>The device was called "LANÇA-FOGUETES DE 37mm PARA TROPAS TERRESTRES" and was used during the Portuguese Colonial War in the 1960s and 1970s. The ammunition used was 37mm French SNEB aircraft rockets.

https://sassik.livejournal.com/118259.html
https://operacional.pt/lanca-foguetes-de-37mm-para-tropas-terrestres/