Vietnam Era Philippine Army Airborne Jump Wing Set El Oro Hallmark Sterling. Each is about an inch and a half wide. Silver background with high quality enameled details. The basic and the master are hallmarkedĀ STERLING EL ORO J TUPAZ JR. The senior is hallmarked EL ORO J TUPAZ JR. These are some of the best made Philippine wings we have ever had. Clutch back.