Races per nation
Number of races and racedays per country in 1957.
Top nations for team
100% of all racedays for Arbos - Bif - Welter were in Italy, Switzerland or France.
100
Per country
| Pos. | Nation | Number of races | Racedays |
|---|---|---|---|
| 1 | Italy | 14 | 46 |
| 2 | Switzerland | 2 | 2 |
| 3 | France | 1 | 1 |