No 3 (Special Investment) Department
Following the introduction of the No 3 Investment Department on January 1st 1967, a separate style of passbook was issued for this
type of savings account. Reflecting the higher rate of interest to be paid on this 'Special Investment' account, a superior style
of passbook was used, as illustrated below. The passbook had a more substantial feel that those used for the No 1 and No 2 Departments,
having a stiff cover instead of a flexible one.