He scored 16 goals in the domestic league, four were in the two cup competitions, three were in European competitions and the other 18 were scored during the test games. After his time in Basel von Wartburg moved on to FC Grenchen in the Nationalliga B (second tier of Swiss football). During this season Grenchen played 30 games, winning 15 times, drawing 10 and losing only five times. With 40 points they ended the season as Nationalliga B champions and were promoted. Von Wartburg played for Grenchen just this one season and then he ended his active football career. Arthur von Wartburg was called up for his country in the 1976–1977 season. He played his debut for Switzerland on 23 April 1977 as they were defeated 0–4 by France in a friendly game. He played four more games for his country including a qualifing match to the 1978 World Cup on 8 June 1977 against Sweden.