400 m, Men
| Competition | 1931 South American Athletics Championships |
|---|---|
| Venue |
Buenos Aires
 ARG
|
| Held | — |
| Status | Medal |
| Competitors | 3 |
| Countries | 2 |
| Pos | Athlete(s) | Country | Mark | ||
|---|---|---|---|---|---|
| 🥇 | José Vicente Salinas |  CHI |
49.6 | ||
| 🥈 | Héctor Domínguez |  URU |
49.8 | ||
| 🥉 | Ernesto Riveros | CHI |
— |