Description:

PENNY-HALFPENNY GREEN: 1½d green part-Harrison Imprint block of 4 on plain cover with central 'REGISTERED/6MR23 B/SYDNEY NSW' cds (a superb strike on the reverse) being the day before the official First Day of Issue, red/white 'NSW/SYDNEY' registration label, 'ARNCLIFFE/7MR23/NSW' arrival b/s, flap removed, minor blemishes & red registration line across the lower units, Cat $10,000. Unique! The ACSC states "only one first day cover can be traced", which is a reference to this cover. [NB: the block apparently started to separate & was affixed in pieces!]