Fastest Fifties by Balls (where recorded) for New Zealand Under-19s in Under-19 Test matches

Balls
44BB McCullumNew Zealand Under-19s v South Africa Under-19sBert Sutcliffe Oval, Lincoln2000/01
55BB McCullumNew Zealand Under-19s v South Africa Under-19sPukekura Park, New Plymouth2000/01

The list shows 2 occurrences of 55 or less