Age of Joining

Currently the minimum age is 17 years to join the RNZN but what was it when you joined?

I joined in 1966 and the age of joining was 16 years 3 months but I know they had Seaman Boys in the January 1966 intake who I believe were only 15 years old.

We know that they were taking boys pre 1914 for training on AMOKURA but interested on what was the age from 1921.