i' ve got quite some material on mercenaries in the congo in the early 1960's. (family)
Mad Mike Hoare and the 350 members of 5 commando (consisting of Hq, mortar platoon, and 8 platoons numbered 51 to 58) (Siegfried Mueller was in charge of 52 commando in 164)
mostly in light khaki, Belgian copies of British webbing, green berets with a regimental insignia in gold (congo star, leopard and palm leaves) , green shoulderstraps met a gold dagger and belgian style rank insignia In 1965 a shoulder badge was introduced (it had 5 commando and a flying goose in black on a white background)
equipment is varied (FAL, MAG, VIGNERON, 81 mm mortar and Blindicide 83mm bazooka) hope this helps