3 Shillings and 6 Pence

New Zealand's Post Office savings stamps and postal orders occupied an unusual administrative position — they were issued through the Post Office rather than the Reserve Bank, which placed them outside the normal currency framework entirely. The 3s 6d denomination maps to a specific postal rate of the period, almost certainly the domestic parcel or registered mail fee, which is why these were produced in such a fixed face value rather than as a round-sum money order.

Watermarking on Post Office paper instruments of this period was handled by the Government Printer in Wellington. Retention rates are poor — most were redeemed and pulped.