RE Series No 17
Date: 14 November 1973.
Title: Bicentenary of King's Bastion, Gibraltar 1773-1973.
Type: First Day of Issue - Commemorative Cover. 2 x Stamps: 1p Gibraltar issued commemorative, Bicentenary of RE in Gibraltar, issued 6 March : 3½p Royal Wedding. Special Handstamp: Corps of Royal Engineers Bicentenary of Kings Bastion Gibraltar, BFPS 1387, Sketch of the Rock of Gibraltar in the centre.
See: Wiki King's Bastion
bfpsgibraltarkings bastionresnseries no