NEW ZEALAND. 1931. HEALTH, SMILING BOYS PAIR. REPROS.  These stamps are the most sort after of the New Zealand health stamps. The fight to eradicate tuberculosis was the main reason health stamps were issued, along with the burgeoning health movement. They are almost identical except for their values and some minor changes to the position of the 'D' in the value boxes. SG lists these stamps as SG546/547.  Value estimate 2020 STERLING $160.00  [A$305.00] MINT. PER PAIR.