1902 Duty Stamp 1p violet & green, rouletted 13 1/2 x 13 1/4, green color (center and value) inverted, l.h., natural gum wrinkles, rounded upper left corner, fine, with 2007 Royal certificate. A fine example of this rarity, only seven (including a horizontal pair) examples recorded, with a regular stamp included for comparison, ex Sagar (Cat No. Barefoot 2) (Image)

Est.US$6,000

2004 Olympic Games $2 Peter Snell (gold medalist for 800 meters in Rome in 1960), center inverted (as the prismatic plastic design is upside down). This spectacular error was found in a local Hamilton post office and it is believed that only a single pane of 16 was issued. When a customer, who went to buy a stamp for his overseas mail noticed the error, he came back and purchased the remaining seven stamps (by this time half the pane had already been sold to public and are likely to have been used on mail and subsequently discarded). One of the examples has been sold back to New Zealand Post and is currently displayed in the New Zealand National Museum at Te Papa as the most significant NZ stamp error after the 1905 4d Taupo inverted center error. The current error was found shortly after release and once NZ Post heard of this problem, the remaining stamps were withdrawn from circulation. A rarity, with 2005 Royal certificate (a similar error realized $2,875 in our Sagar sale October 2011) (Cat No. 1971var) (Image)

Est.US$2,000

1902 KEVII 2sh6p Revenue stamp, Center Inverted, well centered, n.h., natural gum creases and toned specks, v.f. (Cat No. Barefoot 83a) (Image)

Est.US$400

1923-28 2b buff & black, numeral and overprint inverted, also 50c and 60c numerals and overprint inverted, the former n.h., with Raybaudi certificate, the latter h.r., fine-v.f. (Sass.34a,46a,47a) cat. $1370 (Cat No. J24a,J36a,37a) (Image)

Cat. $1370, Est.US$500