Bib Latchford played 85 games for Swansea
In 1981/82 season he played in the number 11 shirt in all but one of his 31 appearances.
Leighton James was number 9.
In other seasons he mainly wore number 11 or 10 however wore the number 9 shirt for his last 15 games for the Swans.
So the answer is mainly number 11 but also 10 and 9!