½d shades mostly in blocks of 4 with numerous varieties on annotated pages, some hinge remainders but generally fine to very fine with some units being unmounted.  (176 stamps) (Image1)

Estimate AU$300

1d carmine-rose with Secret Mark ACSC 74(4)d tied by 1920 Sydney 'HELP REPATRIATION/BUY/WAR SAVING CERTIFICATES' machine cancel on Farmers & Graziers' Co-Operative cover to Singleton (NSW) at the printed matter rate with the flap unsealed (Cat $175 for used; unpriced on cover); plus 1915 cover to USA with 1d red Die II tied by Sydney machine underpaid and taxed with US Postage Dues (Cat $200 on cover); both with a couple of very minor blemishes.     (2)

Grade A- (Image1)

Estimate AU$200

1½d black-brown ACSC 84 (SG 51) Electro 4 complete sheet with all margins, TS Harrison 2-line imprint and all ACSC-listed varieties, '25 Sheets' h/s in violet on gum in U/L margin, variable centring as to be expected, a couple of light folds including through the gutter, a few perfs reinforced in top margin only otherwise unmounted, Cat $4000+ for mounted varieties & imprint block of 4 plus 108 unmounted units (£840+, for mounted normal stamps).  

Grade A/A- (Image1)

Estimate AU$1,000