cover 1851 (1 Feb.) E.L. from Guatemala to Paris, showing fine Belize double-arc d.s. (19.2) overstruck by London transit c.d.s. (25.3) on reverse and, on face, unframed "PANAMA/TRANSIT" in red overstruck by h.s. "21" and Calais entry c.d.s.; horizontal filing crease clear of markings. Photo