AUSTRALIAN COLONIES, VICTORIA, 1850-59 HALF-LENGTHS, PERFORATED 12 BY ROBINSON
J.S. Campbell printings: 3d Blue Retouch 'under 'C' of VICTORIA' , SG 78a, cancelled Melbourne '1' clear of subject area. Retouches are extremely rare in the perforated issue. Ex Pack, Forster, Perry
Campbell & Fergusson printings: 3d Greenish Blue, SG 79, unusually deep shade. Kellow states that 'about two dozen copies are known'