细节
cover 1899 (24 Apr.) OHBMS envelope (223x96mm.) with "H.B.M. Office of Works, SHANGHAI" imprint at lower left, registered from Macau to Shanghai, bearing 2a. and 8a. with Macau c.d.s and red on yellow registration label and showing, at foot, a good strike of the very rare "REGISTERED SHANGHAI" squared-circle d.s.; strenghtened vertical crease clear of the d.s. At the time that the Webb book was published the author had only recorded one example of this marking. Photo