Uniforms from October 1956 (R.R.M. 44 modifications) to September 1967 (RV-170-1). 

Picture
Right: Conscript soldier of the Argentine Army with jacket chaqueta without pockets, sand color trousers and shoes. Photo circa 1954-1956. Left: Conscript Soldier from 1962-63,  in service duty with the same enlisted jacket without pockets and combat trousers and boots; The soldier here is equipped with a Swiss steel helmet, 1909 ammo pouches and suspenders, and armed with the 1909 Mauser Carbine.
Argentine Army troops with M51 OTAN NATO helmet liner. Photo circa 1960.
Army cadets with "blusa campera" circa 1956.
Infantry. Photo 1959.
 Photos from 1955 to the 1960s. The soldier on the right has collar tabs in a reduced version with respect to the standards of the 40s and early 50s; Below it has the regimental number in small scale brass number. This photo could be from 1955-56.  He also has a jacket without pockets. The soldier on the left (Circa 1963) has another type of neck and side cap badge, this one has the brass numbers (RIM 20) as in the 40s/50s but without National Cockade. The pin-collar probably became the Infantry School or the Mountain School.

Paratroopers Middle 1950s - 60s

Argentine Paratrooper 50s/60s. Photo reenactment impression.

Circa 1954 - 59. Argentine Army Summer  IKE type jacket.