Stamps & Covers Public Auction 362

Official covers 1930s with 1d green opt OS (no flap), 2d red opt OS (assume CofA wmk) on Stamp Duties Office or Prickly Pear Commissions covers, 3d perf OS (NSW type) & 2d red non-perfins on registered Electoral Commissioner RTS cover, & finally perf OS margin piece from red stamp (1½d or 2d) tied by 'Bullfinch' WA cds & accepted as postage! (5) (P)