Dimensions: 10 x 15 cm. (3.9 x 5.9″)

Publisher/Editor: The Photographic Greeting Card Co. Ltd., London

Condition: Postally used, backside written and postmarked. A wear to the bottom. Good condition with some signs of age.

Notes: Guard mounting, changing the guard, or the changing of the guard, is a formal ceremony in which sentries performing ceremonial guard duties at important institutions are relieved by a new batch of sentries. The ceremonies are often elaborate and precisely choreographed. (Wikipedia)