400 m, Men
| Competition | 1973 South American Athletics U18 Championships |
|---|---|
| Venue |
Comodore Rivadavia
 ARG
|
| Held | — |
| Status | Medal |
| Competitors | 3 |
| Countries | 3 |
| Pos | Athlete(s) | Country | Mark | ||
|---|---|---|---|---|---|
| 🥇 | Aníbal Lanz | ARG |
50.9 | ||
| 🥈 | Patricio Proaño |  ECU |
51.4 | ||
| 🥉 | Rodrigo Garcés |  CHI |
51.4 |