36th International Auction- part 2- philately & picture postcards

1868, 2c. on 1a. deep brown (damaged at top) in combination with 6c. dull lilac horiz. strip of three and single 12c. blue, on cover from Singapore to Prestonians/Scotland, oblit. by D14 duplex "AP 7 68", faint red London receiver alongside and arrival mark "PRESTONIANS MY 7" on reverse, envelope and stamps some postal wear/imperfections as to be expected; rare cover!