AUSTRALIA / NEW SOUTH WALES / N.S.W.
1856 6d orange/indigo Registered stamp, imperforate, no watermark, used – has a ‘23’ numeral cancel (= Wollongong), no thins, tears or bends.
This cancel has a rarity rating of SS in the publication The Numeral Cancellations of New South Wales by Freeman & White.
SG Cat. # 105