Lot of 4 Muscat Oman Queen Elizabeth II Postage Revenue Stamps SC #65-68

Lot of 4 Muscat and Oman postage revenue stamps featuring Queen Elizabeth II Wilding portraits with colored designs and overprinted “POSTAGE REVENUE PENNY” text. Good pre-owned condition; mint never hinged. The stamps are offered as a group for collectors of Middle Eastern stamps, British Commonwealth issues, and postal history.