SG 40 1d Rose Red Position TI in fine used condition with classic 603 Duplex numeral of Oxford in combination with the red OUS protective overprint.

With the OUS protective overprint of Oxford Union Society. Sure most of you will know but these were officially applied to some stamps as a deterrent against theft back in the days when mint stamps could be exchanged to pay bills or even for cash at the Post Offices.

The overprints being then superseded by perfins doing the same job.