cover -- "6" in black on 10c. on 4d., two examples, one showing variety "6" only inverted, on 1891 (22 Dec.) "Aikman" XU5 registered to Glasgow, showing light Belize c.d.s., "R" in oval and, on reverse, Registered Glasgow Sorting Tender c.d.s.; the cover a little soiled. A rare stamp on cover. R.P.S. Certificate (1930). S.G. 44b, #2250+. Photo